Initial import: chezmoi source for CachyOS + Umbriel + Noctalia

Imported from prdlk/dotfiles master (efdd827). Drops the niri, Hyprland/Omarchy,
macOS, and Blume docs-site layers; docs/ is plain Markdown.

docs/terminal/README.md

@@ -0,0 +1,19 @@
+# Terminal
+
+Terminal emulators and multiplexers configured by the dotfiles.
+
+kitty is the primary terminal. It runs in three modes: plain kitty (kitty owns splits and tabs), a tmux host, and a herdr host. Ghostty is a tmux-only terminal: every window attaches to tmux, and its `ctrl+shift` chords drive tmux.
+
+| Page | Source | What it covers |
+| --- | --- | --- |
+| [kitty](kitty.md) | external repo via `.chezmoiexternals/kitty.toml` | Main config, host configs (tmux, herdr, goliath), kittens, custom tab bar |
+| [Ghostty](ghostty.md) | external repo via `.chezmoiexternals/ghostty.toml` | tmux-only terminal: ctrl+shift chords → tmux, themes |
+| [tmux](tmux.md) | external repo via `.chezmoiexternals/tmux.toml` | Prefix, bindings, kitty-style tabs with Nerd Font icons, resurrect/continuum persistence |
+| [herdr](herdr.md) | external repo via `.chezmoiexternals/herdr.toml`, plus `dot_config/herdr-nvim/` | Agent-aware multiplexer: keys, theme, plugins, Claude hook |
+
+## Shared conventions
+
+- Font: VictorMono Nerd Font everywhere.
+- Background opacity `0.9`, no window decorations; the compositor provides blur.
+- Prefix `ctrl+b` in tmux and herdr. kitty and Ghostty translate chords into the prefix byte `\x02` plus a key, so the same physical shortcut works across hosts.
+- `ctrl+h/j/k/l` moves between panes across nvim, kitty, tmux, and herdr (vim-aware handoff at every layer).