feat: migrate from lazy.nvim to vim.pack

Replace lazy.nvim plugin manager with Neovim 0.12's native vim.pack API.
All plugin config files rewritten from lazy.nvim spec tables to imperative
require/setup format with explicit vim.keymap.set() calls.

Key changes:
- vim.pack.add() with ~53 plugins in init.lua
- blink.cmp/pairs/download pinned to version tags (vim.version.range)
- PackChanged autocmd for markdown-preview build hook
- Ordered requires: colorscheme → ui → treesitter → completion → lsp → rest
- Plugin setup guards (gitsigns, which-key, blink.cmp) handle deferred
  plugin/ file loading correctly

Net reduction: ~438 lines across 13 files.

1 files changed, 118 insertions, 154 deletions

diff --git a/home/.config/nvim/lua/plugins/git.lua b/home/.config/nvim/lua/plugins/git.lua
index 9e920e2..b052c33 100644
--- a/home/.config/nvim/lua/plugins/git.lua
+++ b/home/.config/nvim/lua/plugins/git.lua
@@ -1,159 +1,123 @@
-return {
-  {
-    "akinsho/git-conflict.nvim",
-    event = "BufRead",
-    opts = {
-      disable_diagnostics = true,
-      default_mappings = {
-        next = "]x",
-        prev = "[x",
-      },
-    },
+require("git-conflict").setup({
+  disable_diagnostics = true,
+  default_mappings = {
+    next = "]x",
+    prev = "[x",
   },
-  {
-    "NeogitOrg/neogit",
-    dependencies = {
-      "nvim-lua/plenary.nvim",
-    },
-    keys = {
-      {
-        "<leader>go",
-        function()
-          require("neogit").open()
-        end,
-        desc = "neo[G]it [O]pen",
-      },
-    },
-    cmd = "Neogit",
-    opts = {
-      disable_commit_confirmation = true,
-      kind = "split",
-      console_timeout = 5000,
-      auto_show_console = false,
-    },
-  },
-  {
-    "ruifm/gitlinker.nvim",
-    keys = {
-      {
-        "<leader>gy",
-        function()
-          require("gitlinker").get_buf_range_url("n")
-        end,
-      },
-      {
-        "<leader>gy",
-        function()
-          require("gitlinker").get_buf_range_url("v")
-        end,
-        mode = "v",
-      },
-    },
-    dependencies = {
-      "nvim-lua/plenary.nvim",
-    },
-    opts = {
-      callbacks = {
-        ["git.sommerfeld.dev"] = function(url_data)
-          local url = require("gitlinker.hosts").get_base_https_url(url_data)
-          url = url .. "/tree/" .. url_data.file .. "?id=" .. url_data.rev
-          if url_data.lstart then
-            url = url .. "#n" .. url_data.lstart
-          end
-          return url
-        end,
-      },
-    },
+})
+
+require("neogit").setup({
+  disable_commit_confirmation = true,
+  kind = "split",
+  console_timeout = 5000,
+  auto_show_console = false,
+})
+
+vim.keymap.set("n", "<leader>go", function()
+  require("neogit").open()
+end, { desc = "neo[G]it [O]pen" })
+
+require("gitlinker").setup({
+  callbacks = {
+    ["git.sommerfeld.dev"] = function(url_data)
+      local url = require("gitlinker.hosts").get_base_https_url(url_data)
+      url = url .. "/tree/" .. url_data.file .. "?id=" .. url_data.rev
+      if url_data.lstart then
+        url = url .. "#n" .. url_data.lstart
+      end
+      return url
+    end,
   },
-  {
-    "lewis6991/gitsigns.nvim",
-    event = "BufRead",
-    opts = {
-      signs = {
-        change = { show_count = true },
-        delete = { show_count = true },
-        topdelete = { show_count = true },
-        changedelete = { show_count = true },
-      },
-      numhl = true,
-      on_attach = function(bufnr)
-        local gs = require("gitsigns")
-        local function map(mode, l, r, desc)
-          vim.keymap.set(mode, l, r, { buffer = bufnr, desc = desc })
-        end
-        local function nmap(l, r, desc)
-          map("n", l, r, desc)
-        end
-        local function vmap(l, r, desc)
-          map("v", l, r, desc)
-        end
-        -- Navigation
-        nmap("]c", function()
-          if vim.wo.diff then
-            vim.cmd.normal({ "]c", bang = true })
-          else
-            gs.nav_hunk("next")
-          end
-        end, "Jump to next git [c]hange")
+})
 
-        nmap("[c", function()
-          if vim.wo.diff then
-            vim.cmd.normal({ "[c", bang = true })
-          else
-            gs.nav_hunk("prev")
-          end
-        end, "Jump to previous git [c]hange")
+vim.keymap.set("n", "<leader>gy", function()
+  require("gitlinker").get_buf_range_url("n")
+end)
+vim.keymap.set("v", "<leader>gy", function()
+  require("gitlinker").get_buf_range_url("v")
+end)
 
-        -- Actions
-        nmap("<leader>hs", gs.stage_hunk, "git [s]tage hunk")
-        nmap("<leader>hr", gs.reset_hunk, "git [r]eset hunk")
-        vmap("<leader>hs", function()
-          gs.stage_hunk({ vim.fn.line("."), vim.fn.line("v") })
-        end, "git [s]tage hunk")
-        vmap("<leader>hr", function()
-          gs.reset_hunk({ vim.fn.line("."), vim.fn.line("v") })
-        end, "git [r]eset hunk")
-        nmap("<leader>hS", gs.stage_buffer, "git [S]tage buffer")
-        nmap("<leader>hR", gs.reset_buffer, "git [R]eset buffer")
-        nmap("<leader>hp", gs.preview_hunk, "git [p]review hunk")
-        nmap("<leader>hb", function()
-          gs.blame_line({ full = true })
-        end, "git [b]lame line")
-        nmap(
-          "<leader>tb",
-          gs.toggle_current_line_blame,
-          "[T]oggle git show [b]lame line"
-        )
-        nmap("<leader>hd", gs.diffthis, "git [d]iff against index")
-        nmap("<leader>hD", function()
-          gs.diffthis("~")
-        end, "git [D]iff against last commit")
-        nmap("<leader>hc", gs.change_base, "git [C]hange base to index")
-        nmap("<leader>hC", function()
-          gs.change_base("~")
-        end, "git [C]hange base to HEAD")
-        nmap(
-          "<leader>tgd",
-          gs.preview_hunk_inline,
-          "[T]oggle [G]it show [D]eleted"
-        )
-        nmap("<leader>tgw", gs.toggle_word_diff, "[T]oggle [G]it [W]ord diff")
-        nmap(
-          "<leader>tgl",
-          gs.toggle_linehl,
-          "[T]oggle [G]it [L]ine highlighting"
-        )
-        -- Text object
-        map(
-          { "o", "x" },
-          "ih",
-          ":<C-U>Gitsigns select_hunk<CR>",
-          "git [H]unk text object"
-        )
-      end,
-    },
-    dependencies = {
-      "nvim-lua/plenary.nvim",
-    },
+require("gitsigns").setup({
+  signs = {
+    change = { show_count = true },
+    delete = { show_count = true },
+    topdelete = { show_count = true },
+    changedelete = { show_count = true },
   },
-}
+  numhl = true,
+  on_attach = function(bufnr)
+    local gs = require("gitsigns")
+    local function map(mode, l, r, desc)
+      vim.keymap.set(mode, l, r, { buffer = bufnr, desc = desc })
+    end
+    local function nmap(l, r, desc)
+      map("n", l, r, desc)
+    end
+    local function vmap(l, r, desc)
+      map("v", l, r, desc)
+    end
+    -- Navigation
+    nmap("]c", function()
+      if vim.wo.diff then
+        vim.cmd.normal({ "]c", bang = true })
+      else
+        gs.nav_hunk("next")
+      end
+    end, "Jump to next git [c]hange")
+
+    nmap("[c", function()
+      if vim.wo.diff then
+        vim.cmd.normal({ "[c", bang = true })
+      else
+        gs.nav_hunk("prev")
+      end
+    end, "Jump to previous git [c]hange")
+
+    -- Actions
+    nmap("<leader>hs", gs.stage_hunk, "git [s]tage hunk")
+    nmap("<leader>hr", gs.reset_hunk, "git [r]eset hunk")
+    vmap("<leader>hs", function()
+      gs.stage_hunk({ vim.fn.line("."), vim.fn.line("v") })
+    end, "git [s]tage hunk")
+    vmap("<leader>hr", function()
+      gs.reset_hunk({ vim.fn.line("."), vim.fn.line("v") })
+    end, "git [r]eset hunk")
+    nmap("<leader>hS", gs.stage_buffer, "git [S]tage buffer")
+    nmap("<leader>hR", gs.reset_buffer, "git [R]eset buffer")
+    nmap("<leader>hp", gs.preview_hunk, "git [p]review hunk")
+    nmap("<leader>hb", function()
+      gs.blame_line({ full = true })
+    end, "git [b]lame line")
+    nmap(
+      "<leader>tb",
+      gs.toggle_current_line_blame,
+      "[T]oggle git show [b]lame line"
+    )
+    nmap("<leader>hd", gs.diffthis, "git [d]iff against index")
+    nmap("<leader>hD", function()
+      gs.diffthis("~")
+    end, "git [D]iff against last commit")
+    nmap("<leader>hc", gs.change_base, "git [C]hange base to index")
+    nmap("<leader>hC", function()
+      gs.change_base("~")
+    end, "git [C]hange base to HEAD")
+    nmap(
+      "<leader>tgd",
+      gs.preview_hunk_inline,
+      "[T]oggle [G]it show [D]eleted"
+    )
+    nmap("<leader>tgw", gs.toggle_word_diff, "[T]oggle [G]it [W]ord diff")
+    nmap(
+      "<leader>tgl",
+      gs.toggle_linehl,
+      "[T]oggle [G]it [L]ine highlighting"
+    )
+    -- Text object
+    map(
+      { "o", "x" },
+      "ih",
+      ":<C-U>Gitsigns select_hunk<CR>",
+      "git [H]unk text object"
+    )
+  end,
+})