Extra reserved combos and shared mock options.
The keys mock service.
const keys = createMockKeysService();
keys.handleMessage('w1', { type: 'keys.registerAction', id: 'r1', action: { id: 'editor.save', label: 'Save', defaultKey: 'Ctrl+S' } }, send);
// → { type: 'keys.registerAction.result', id: 'r1', actionId: 'editor.save', binding: 'Ctrl+S' }
// → { type: 'keys.bindings', bindings: [{ actionId: 'editor.save', key: 'Ctrl+S' }] }
Create the NAP-KEYS mock.