Remove nest feeder and query cache components completely

- Delete NestFeederSettings.tsx and QueryCacheSettings.tsx files
- Remove nest feeder and query cache from SettingsPage.tsx navigation
- Remove from SettingsNavigation.tsx tabs array
- Remove nest feeder logic from useGenericSettings.ts hook
- Remove from settings type definitions
- Clean up unused imports (DatabaseOutlined, ApiOutlined)
- Update advanced settings layout to exclude removed components

Author: Maphikza