Replay personal customizations onto the new vim.pack kickstart base

Re-apply the user's customizations (previously living as an uncommitted
diff on the OLD lazy.nvim kickstart base) onto the new single-file
vim.pack-based kickstart, adapting them to the new architecture:

- Enable Nerd Font (have_nerd_font = true).
- VimTeX: lua/custom/plugins/vimtex.lua (ported from the lazy `lazy=false`
  spec to vim.pack; globals set before load, zathura viewer, latexmk) plus
  the three <leader>l keymaps.
- nvim-java: lua/custom/plugins/nvim-java.lua installs the plugin only
  (mirrors the user's original `return { 'nvim-java/nvim-java' }`; wiring
  is finished in a later commit).
- LSP servers: add jdtls, plus ty (Astral's Python type checker) and ruff.
  ty is not in nvim-lspconfig, so it's defined via the new vim.lsp.config
  API (cmd/filetypes/root_markers) instead of the old lspconfig.configs path.
- Mason: exclude ty and ruff from auto-install (installed separately via uv).
- conform: re-apply the user's formatter entries.
- treesitter: add `latex` to the installed parsers.
- Enable the optional kickstart modules the user had on (debug, indent_line,
  lint, autopairs, neo-tree, gitsigns) and the custom.plugins loader, via the
  new base's `require` mechanism (not lazy `import`).
- lint.lua: guard markdownlint behind `vim.fn.executable`.
- debug.lua: add java-debug-adapter and java-test to mason-nvim-dap.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

init.lua

@@ -99,7 +99,7 @@ do
   vim.g.maplocalleader = ' '
 
   -- Set to true if you have a Nerd Font installed and selected in the terminal
-  vim.g.have_nerd_font = false
+  vim.g.have_nerd_font = true
 
   -- [[ Setting options ]]
   --  See `:help vim.o`
@@ -705,6 +705,30 @@ do
 
     stylua = {}, -- Used to format Lua code
 
+    -- Java language server (installed via Mason).
+    jdtls = {},
+
+    -- ty: Astral's Python type checker. Not yet shipped by nvim-lspconfig, so we
+    -- define the whole config here (ported from the old `lspconfig.configs.ty`
+    -- approach to the new `vim.lsp.config` API). Installed separately via uv, so
+    -- it is excluded from Mason below.
+    ty = {
+      cmd = { 'ty', 'server' },
+      filetypes = { 'python' },
+      root_markers = { 'pyproject.toml', 'ty.toml', '.git' },
+    },
+
+    -- ruff: Python linter/formatter LSP. nvim-lspconfig ships the base `ruff`
+    -- config (cmd, etc.); this only overlays init_options. Installed separately
+    -- via uv, so it is excluded from Mason below.
+    ruff = {
+      init_options = {
+        settings = {
+          fixAll = true,
+        },
+      },
+    },
+
     -- Special Lua Config, as recommended by neovim help docs
     lua_ls = {
       on_init = function(client)
@@ -758,6 +782,9 @@ do
   --
   -- You can press `g?` for help in this menu.
   local ensure_installed = vim.tbl_keys(servers or {})
+  -- ty and ruff are installed separately via uv (~/.local/bin), so exclude them
+  -- from Mason auto-install.
+  ensure_installed = vim.tbl_filter(function(name) return name ~= 'ty' and name ~= 'ruff' end, ensure_installed)
   vim.list_extend(ensure_installed, {
     -- You can add other tools here that you want Mason to install
   })
@@ -796,12 +823,12 @@ do
     },
     -- You can also specify external formatters in here.
     formatters_by_ft = {
-      -- rust = { 'rustfmt' },
+      lua = { 'stylua' },
       -- Conform can also run multiple formatters sequentially
-      -- python = { "isort", "black" },
-      --
+      python = { 'isort', 'black' },
       -- You can use 'stop_after_first' to run the first available formatter from the list
-      -- javascript = { "prettierd", "prettier", stop_after_first = true },
+      javascript = { 'prettierd', 'prettier', stop_after_first = true },
+      SQL = { 'sql-formatter' },
     },
   }
 
@@ -904,7 +931,7 @@ do
   vim.pack.add { { src = gh 'nvim-treesitter/nvim-treesitter', version = 'main' } }
 
   -- Ensure basic parsers are installed
-  local parsers = { 'bash', 'c', 'diff', 'html', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' }
+  local parsers = { 'bash', 'c', 'diff', 'html', 'latex', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' }
   require('nvim-treesitter').install(parsers)
 
   ---@param buf integer
@@ -966,17 +993,17 @@ do
   --  Here are some example plugins that I've included in the Kickstart repository.
   --  Uncomment any of the lines below to enable them (you will need to restart nvim).
   --
-  -- require 'kickstart.plugins.debug'
-  -- require 'kickstart.plugins.indent_line'
-  -- require 'kickstart.plugins.lint'
-  -- require 'kickstart.plugins.autopairs'
-  -- require 'kickstart.plugins.neo-tree'
-  -- require 'kickstart.plugins.gitsigns' -- adds gitsigns recommended keymaps
+  require 'kickstart.plugins.debug'
+  require 'kickstart.plugins.indent_line'
+  require 'kickstart.plugins.lint'
+  require 'kickstart.plugins.autopairs'
+  require 'kickstart.plugins.neo-tree'
+  require 'kickstart.plugins.gitsigns' -- adds gitsigns recommended keymaps
 
   -- NOTE: You can add your own plugins, configuration, etc from `lua/custom/plugins/*.lua`
   --
   --  Uncomment the following line and add your plugins to `lua/custom/plugins/*.lua` to get going.
-  -- require 'custom.plugins'
+  require 'custom.plugins'
 end
 
 -- The line beneath this is called `modeline`. See `:help modeline`

lua/custom/plugins/nvim-java.lua

@@ -0,0 +1,7 @@
+-- nvim-java: Java IDE layer on top of jdtls.
+-- https://github.com/nvim-java/nvim-java
+--
+-- NOTE: This only installs the plugin (mirroring the user's original
+-- `return { 'nvim-java/nvim-java' }` spec). It is NOT yet initialized, so jdtls
+-- currently runs vanilla. Wiring (`require('java').setup()`) is finished later.
+vim.pack.add { 'https://github.com/nvim-java/nvim-java' }

lua/custom/plugins/vimtex.lua

@@ -0,0 +1,27 @@
+-- VimTeX: LaTeX support (compile, view, errors)
+-- https://github.com/lervag/vimtex
+--
+-- Ported from the user's lazy.nvim spec (lazy = false) to this base's `vim.pack`
+-- imperative style. VimTeX reads its `vim.g.vimtex_*` settings when it is sourced,
+-- so we set them BEFORE `vim.pack.add` loads the plugin (the equivalent of the old
+-- lazy `init` hook).
+
+-- Viewer settings (adjust based on your PDF viewer)
+vim.g.vimtex_view_method = 'zathura' -- Use 'skim' on macOS, 'sumatra' on Windows, etc.
+
+-- Compiler settings
+vim.g.vimtex_compiler_method = 'latexmk' -- Default compiler backend
+
+-- Optional: Disable some features if you don't need them
+vim.g.vimtex_quickfix_enabled = 1 -- Enable quickfix window for errors
+vim.g.vimtex_syntax_enabled = 1 -- Syntax highlighting (works with Tree-sitter too)
+
+-- Set TeX flavor (usually not needed, but good to know)
+vim.g.tex_flavor = 'latex'
+
+vim.pack.add { 'https://github.com/lervag/vimtex' }
+
+-- LaTeX keymaps (which-key group label is defined in init.lua: `<leader>l` = [L]aTeX)
+vim.keymap.set('n', '<leader>ll', '<cmd>VimtexCompile<CR>', { desc = 'Compile LaTeX' })
+vim.keymap.set('n', '<leader>lv', '<cmd>VimtexView<CR>', { desc = 'View PDF' })
+vim.keymap.set('n', '<leader>le', '<cmd>VimtexErrors<CR>', { desc = 'Show Errors' })

lua/kickstart/plugins/debug.lua

@@ -42,6 +42,8 @@ require('mason-nvim-dap').setup {
   ensure_installed = {
     -- Update this to ensure that you have the debuggers for the langs you want
     'delve',
+    'java-debug-adapter',
+    'java-test',
   },
 }
 

lua/kickstart/plugins/lint.lua

@@ -4,7 +4,9 @@ vim.pack.add { 'https://github.com/mfussenegger/nvim-lint' }
 
 local lint = require 'lint'
 lint.linters_by_ft = {
-  markdown = { 'markdownlint' }, -- Make sure to install `markdownlint` via mason / npm
+  -- Only enable markdownlint if it is actually installed (it is not installed here),
+  -- otherwise nvim-lint errors on every markdown buffer.
+  markdown = vim.fn.executable 'markdownlint' == 1 and { 'markdownlint' } or {},
 }
 
 -- To allow other plugins to add linters to require('lint').linters_by_ft,