feat: neovim — explicit lazy.nvim config (no LazyVim)

[davidstosik]

What is this?

Neovim configuration using lazy.nvim (the plugin manager) directly, with every plugin explicitly configured. No LazyVim framework — full control, no hidden magic.

Note: This PR targets v5-redux and layers on top of the base dotfiles setup.

Plugins

Each plugin lives in its own file under config/nvim/lua/plugins/:

Plugin	Purpose
Tokyo Night	Colorscheme (matches tmux + Ghostty)
Telescope + fzf-native	Fuzzy finder (files, grep, buffers, symbols)
Treesitter	Syntax highlighting (Ruby, Lua, JS/TS, Bash, YAML, Markdown, etc.)
Mason + lspconfig	LSP servers (ruby_lsp, lua_ls auto-installed)
nvim-cmp	Completion (LSP, buffer, path, snippets with Tab)
Lualine	Statusline
Oil.nvim	File explorer (press - to browse filesystem)
Gitsigns	Git gutter + hunk navigation
Fugitive	:Git commands
Comment.nvim	Toggle comments (gc/gcc)
nvim-surround	Add/change/delete surrounding chars
nvim-autopairs	Auto-close brackets/quotes
nvim-treesitter-endwise	Auto-add end in Ruby/Lua
Trouble	Better diagnostics list
Todo-comments	Highlight TODO/FIXME in code
Which-key	Keybinding hints popup
Indent blankline	Visual indent guides
vim-sleuth	Auto-detect indentation

Key mappings

• Leader: , (comma)
• C-p: Find files (Telescope)
• <leader>fg: Live grep
• <leader>fb: Buffers
• -: Open file explorer (Oil)
• gd/gr/K: LSP go-to-definition, references, hover
• gc/gcc: Toggle comments
• ]d/[d: Next/prev diagnostic

Structure

config/nvim/
├── init.lua              # lazy.nvim bootstrap
└── lua/
    ├── options.lua       # Editor options
    ├── keymaps.lua       # Key mappings
    ├── autocmds.lua      # Autocommands
    └── plugins/
        ├── init.lua          # lazy.nvim bootstrap + spec
        ├── colorscheme.lua   # Tokyo Night
        ├── telescope.lua     # Fuzzy finder
        ├── treesitter.lua    # Syntax highlighting
        ├── lsp.lua           # Language servers
        ├── completion.lua    # nvim-cmp
        ├── ui.lua            # Statusline, file explorer, git signs
        └── editor.lua        # Comments, pairs, surround, etc.

Commits

1. feat: neovim — explicit lazy.nvim config (no LazyVim) — full neovim setup
2. fix: enable treesitter-endwise in treesitter config — endwise needs explicit opt-in in treesitter setup