docs: add KEYBINDINGS.md generated from Hyprland bindings

bin/utils/nomarchy-docs-keybindings parses every bindd= / bindeld=
line in the core + feature binding files into a six-section Markdown
table (Utilities, Tiling, Tiling v2, Clipboard, Media keys, Apps).
233 bindings rendered. code:NN keycodes and XF86* media keys are
prettified.

README's keybinding table is slimmed to five highlights and now
links the generated doc; the roadmap's Now-column row moves to
Shipped.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

README.md

@@ -97,12 +97,12 @@ env-update  # Reloads your Home Manager environment (Runs: home-manager switch -
 
 ## 🚀 Commands & Keybindings
 
+The full list lives in [`docs/KEYBINDINGS.md`](docs/KEYBINDINGS.md) (auto-generated from the Hyprland configs). A few highlights:
+
 | Keybinding | Action |
 | :--- | :--- |
 | `Super + Space` | **App Launcher** (Walker) |
 | `Super + Shift + Space` | **Nomarchy Menu** (Walker) |
-| `Super + Ctrl + Space` | **Background Selector** (Walker) |
-| `Super + Shift + Ctrl + Space` | **Theme Selector** (Walker) |
 | `Super + Alt + Space` | **Toggle Top Bar** (Waybar) |
 | `Super + Return` | Open Terminal |
 | `Super + Q` | Close Window |