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.

editor/initial-state.ts

@@ -17,6 +17,11 @@ export const initialEditorState: EditorState = {
     selectedCandidateId: undefined,
     compareMode: "result",
   },
+  commandPalette: {
+    open: false,
+    query: "",
+    selectedIndex: 0,
+  },
   transformSession: undefined,
   maskEdit: undefined,
   brushPreview: undefined,