Function mockCockpitPermission

mockCockpitPermission(allowed: boolean | null): CockpitPermission
Creates a fake CockpitPermission object.
Parameters
- allowed: boolean | null
  Initial permission state (true, false, or null for pending).
Returns CockpitPermission
Example
```
vi.spyOn(cockpit, "permission").mockReturnValue(mockCockpitPermission(true));
```
- Defined in src/testing/helpers.ts:84