- Added functionality to create, accept, decline, and delete local calendar invitations.
- Integrated email notifications for calendar event invitations and deletions.
- Updated database schema to support local invitations and outbound event tracking.
- Enhanced the calendar UI to display pending invitations and allow users to manage them.
- Localized new strings for invitations in English and German.
feat(federation): add room sync and deletion notification endpoints for federated instances
fix(federation): handle room deletion and update settings during sync process
feat(federation): enhance FederatedRoomCard and FederatedRoomDetail components to display deleted rooms
i18n: add translations for room deletion messages in English and German
