feat: add command palette functionality and shortcuts

- Implemented command palette with keyboard shortcut (⌘K) for opening.
- Added commands for opening, closing, setting query, and selecting items in the command palette.
- Created tests for command palette commands and input handling.
- Enhanced layer actions with functions for adding, grouping, and deleting layers.
- Updated UI components to integrate command palette and shortcuts.

view/ShortcutsDisplay.tsx

@@ -18,6 +18,7 @@ const shortcuts: Shortcut[] = [
   { keys: ["P"], label: "Pan" },
   { keys: ["Space"], label: "Hold to pan" },
   { keys: ["L"], label: "Layers" },
+  { keys: ["⌘", "K"], label: "Commands" },
   { keys: ["⌘", "O"], label: "Open image" },
   { keys: ["⌘", "Z"], label: "Undo" },
   { keys: ["⇧", "⌘", "Z"], label: "Redo" },