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.

input/index.ts

@@ -5,6 +5,7 @@ export {
 } from "./dom";
 export type { CommandKeybind, GlobalKeybindConsumer, Keybind, KeybindEvent, KeybindMap } from "./keyboard";
 export { handleKeybind, keybindFromEvent } from "./keyboard";
+export { handleCommandPaletteKey } from "./command-palette";
 export { handleHistoryKey } from "./history";
 export { handleToolKey } from "./tool-keybinds";
 export { findGroup, findLayerInfoInDocument, handleDeleteSelectionKey, resolveLayerDrop } from "./layers-panel";