Add CLAUDE.md context for dotfiles project

CLAUDE.md

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+## Overview
+
+Personal dotfiles managed with [GNU Stow](https://www.gnu.org/software/stow/). Each top-level directory (`git`, `jj`,
+`nvim`, `vim`, `tmux`, `zsh`) is a stow package whose contents mirror the home directory structure.
+
+## Applying dotfiles
+
+Symlink all configs into `$HOME`:
+
+```sh
+stow git zsh nvim vim tmux jj
+```
+
+To apply a single package:
+
+```sh
+stow nvim
+```
+
+To remove symlinks for a package:
+
+```sh
+stow -D nvim
+```
+
+## Architecture
+
+**Stow package layout**: Files inside each package directory are symlinked relative to `$HOME`. For example,
+`nvim/.config/nvim/init.lua` becomes `~/.config/nvim/init.lua`.
+
+**Neovim** (`nvim/.config/nvim/`):
+
+- Plugin manager: [lazy.nvim](https://github.com/folke/lazy.nvim), configured in `lua/config/lazy.lua`
+- LSPs enabled: `lua_ls`, `ts_ls`, `pyright` — configured in `lua/config/lsp.lua` and individual spec files under `lsp/`
+- Formatting via conform.nvim: stylua (Lua), prettier (Markdown, JS) — auto-formats on save
+- Plugins live under `lua/plugins/`; each file returns a lazy.nvim plugin spec
+- Leader key is `,`
+
+**tmux** (`tmux/.tmux.conf`):
+
+- Prefix: `C-a`
+- Copy uses `wl-copy` (Wayland clipboard)
+- vi-mode keys; vim-style pane navigation
+
+**JJ** (`jj/.config/jj/config.toml`):
+
+- Uses [Jujutsu](https://github.com/jj-vcs/jj) VCS
+- Custom aliases: `tug` (move nearest bookmark), `init` (wraps `jj git init`)
+- Default command: `jj log`