Initial neovim config

Lazy.nvim plugin manager, LSP (rust-analyzer, clangd, ts_ls, zls),
treesitter, telescope, bufferline, neo-tree, gitsigns, lazygit,
alabaster theme, persistence sessions, nvim-cmp, lualine, which-key.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lua/config/options.lua

@@ -0,0 +1,49 @@
+local opt = vim.opt
+
+-- Line numbers
+opt.number = true
+opt.relativenumber = true
+
+-- Tabs & indentation
+opt.tabstop = 4
+opt.shiftwidth = 4
+opt.expandtab = true
+opt.smartindent = true
+
+-- Search
+opt.ignorecase = true
+opt.smartcase = true
+opt.hlsearch = true
+opt.incsearch = true
+
+-- Appearance
+opt.termguicolors = true
+opt.signcolumn = "yes"
+opt.cursorline = true
+opt.scrolloff = 8
+opt.sidescrolloff = 8
+
+-- Line wrapping
+opt.wrap = false
+
+-- Clipboard
+opt.clipboard = "unnamedplus"
+
+-- Split behavior
+opt.splitright = true
+opt.splitbelow = true
+
+-- Undo / swap
+opt.undofile = true
+opt.swapfile = false
+opt.backup = false
+
+-- Performance
+opt.updatetime = 250
+opt.timeoutlen = 300
+
+-- Completion menu
+opt.completeopt = "menuone,noselect"
+
+-- File encoding
+opt.fileencoding = "utf-8"