feat(calendar): implement local calendar invitations with email notifications

- 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.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "redlight",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "redlight",
-      "version": "1.3.0",
+      "version": "1.4.0",
       "dependencies": {
         "axios": "^1.7.0",
         "bcryptjs": "^2.4.3",