Initial dotfiles setup with GNU stow

Centralize dotfiles from ~ into stow packages:
- zsh: .zshrc, .zshenv
- git: .gitconfig
- nvim: init.lua, lua/, plugin/, after/, lazy-lock.json
- tmux: tmux.conf, session-list.sh
- karabiner: karabiner.json
- ghostty: config.ghostty
- claude: CLAUDE.md, settings.json, settings.local.json, statusline.sh, 30 commands

ghostty/Library/Application Support/com.mitchellh.ghostty/config.ghostty

@@ -0,0 +1,86 @@
+theme=Gruvbox Material Dark
+font-family = "Berkeley Mono"
+
+background-opacity = 1
+# background-blur = macos-glass-regular
+font-size=17
+
+window-padding-y = 0
+window-padding-x = 0
+window-padding-color = extend
+
+# settings
+
+mouse-scroll-multiplier = 1
+keybind = global:alt+space=toggle_visibility
+keybind = shift+enter=text:\n
+
+
+
+mouse-hide-while-typing = true
+
+# macOS-specific settingss
+macos-titlebar-style = hidden
+macos-option-as-alt = true
+
+# window controls
+confirm-close-surface = true
+window-title-font-family = VictorMono NFM Italic
+window-padding-balance = true
+window-save-state = always
+
+# extras
+shell-integration-features = true
+copy-on-select = clipboard
+focus-follows-mouse = true
+link-url = true
+
+
+
+# Vim-mode keybindings for Ghostty.
+#
+# Note: We're missing a number of actions to produce a better vim experience.
+# This is what is possible today! But we plan on adding more actions to make
+# this even better in the future.
+
+# Entry point
+keybind = alt+v=activate_key_table:vim
+
+# Key table definition
+keybind = vim/
+
+# Line movement
+keybind = vim/j=scroll_page_lines:1
+keybind = vim/k=scroll_page_lines:-1
+
+# Page movement
+keybind = vim/ctrl+d=scroll_page_down
+keybind = vim/ctrl+u=scroll_page_up
+keybind = vim/ctrl+f=scroll_page_down
+keybind = vim/ctrl+b=scroll_page_up
+keybind = vim/shift+j=scroll_page_down
+keybind = vim/shift+k=scroll_page_up
+
+# Jump to top/bottom
+keybind = vim/g>g=scroll_to_top
+keybind = vim/shift+g=scroll_to_bottom
+
+# Search (if you want vim-style search entry)
+keybind = vim/slash=start_search
+keybind = vim/n=navigate_search:next
+
+# Copy mode / selection
+# Note we're missing a lot of actions here to make this more full featured.
+keybind = vim/v=copy_to_clipboard
+keybind = vim/y=copy_to_clipboard
+
+# Command Palette
+keybind = vim/shift+semicolon=toggle_command_palette
+
+# Exit
+keybind = vim/escape=deactivate_key_table
+keybind = vim/q=deactivate_key_table
+keybind = vim/i=deactivate_key_table
+
+# Catch unbound keys
+keybind = vim/catch_all=ignore