Add standalone Neovim Lua config

Replace the neovim stow package's symlink into vim/.vim with a real,
independent Lua config: init.lua + lua/config/* (options, keymaps,
autocmds, lazy.nvim bootstrap) + lua/plugins/*.lua (one file per plugin
group).

- Plugin manager: lazy.nvim (self-bootstrapping, no submodule needed).
- Carries over every plugin from the vimrc as-is: vim-airline (+ themes,
  tmuxline), vim-janah colorscheme, nerdtree, vim-signify, nerdcommenter,
  ale, vim-fugitive, quick-scope, ctrlp.vim, claude-code.nvim, plus
  vim-ansible-yaml/vim-terraform gated the same way the vimrc gated them
  (executable() checks, now as lazy.nvim `cond` functions).
- Replaces YouCompleteMe + jedi-vim entirely with nvim-lspconfig +
  mason.nvim + mason-lspconfig.nvim (ensure_installed: pyright, lua_ls,
  bashls, terraformls, yamlls, ts_ls, cssls, html; clangd enabled
  directly since it's already on PATH via Xcode CLT) and blink.cmp for
  completion (+ friendly-snippets), with blink's LSP capabilities merged
  into every server's default config.
- ALE stays as a pure linter/fixer (g:ale_disable_lsp = 1) so it doesn't
  duplicate nvim-lspconfig's diagnostics/hover/go-to-definition.
- Ports the vimrc's general settings/functions (options, window-nav
  keymaps, arrow-key disabling, StripTrailingWhitespace, AppendModeline,
  the git->Git abbreviation) to Lua; drops the w!! sudo-save abbreviation
  (vimrc's own comment notes it doesn't work under Neovim) and the
  reload-vimrc-on-save autocmd (no clean Lua equivalent).

Vim's own vimrc, ftplugin/python.vim, and plugin installs are completely
untouched and unaffected by this change.

1 files changed, 36 insertions, 0 deletions

diff --git a/neovim/.config/nvim/lua/config/options.lua b/neovim/.config/nvim/lua/config/options.lua
new file mode 100644
index 0000000..be614e1
--- /dev/null
+++ b/neovim/.config/nvim/lua/config/options.lua
@@ -0,0 +1,36 @@
+-- Ported from vim/.vim/vimrc's "DEFAULT VIM SETTINGS" block. `syntax on` and
+-- `filetype plugin indent on` are intentionally omitted: both are Neovim
+-- defaults (see `:help nvim-defaults`).
+
+local opt = vim.opt
+
+opt.number = true
+opt.relativenumber = true
+opt.list = true
+opt.modeline = true
+opt.background = "dark"
+opt.foldmethod = "indent"
+opt.listchars = { trail = "·", tab = "▸ ", eol = "¬" }
+opt.scrolloff = 1
+opt.backspace = { "indent", "eol", "start" }
+opt.cursorline = true
+opt.hidden = true -- already Neovim's default; set explicitly for parity with the vimrc
+opt.wildmenu = true -- already Neovim's default; set explicitly for parity with the vimrc
+
+-- Faster gutter updates (signify) and snappier <Esc>
+opt.updatetime = 100
+opt.ttimeoutlen = 10
+
+-- Persistent undo across sessions
+local undodir = vim.fn.stdpath("data") .. "/undo"
+if vim.fn.isdirectory(undodir) == 0 then
+  vim.fn.mkdir(undodir, "p", "0700")
+end
+opt.undofile = true
+opt.undodir = undodir
+
+-- Search-related things
+opt.hlsearch = true
+opt.incsearch = true
+opt.ignorecase = true
+opt.smartcase = true