feat(admin): implement pregnancy and birth management features

- Added new admin functionalities to force pregnancy, clear pregnancy, and trigger birth for characters.
- Introduced corresponding routes and controller methods in adminRouter and adminController.
- Enhanced the FalukantCharacter model to include pregnancy-related fields.
- Created database migration for adding pregnancy columns to the character table.
- Updated frontend views and internationalization files to support new pregnancy and birth management features.
- Improved user feedback and error handling for these new actions.

frontend/src/i18n/locales/de/falukant.json

@@ -540,6 +540,10 @@
                 "familyWarning": "Anhaltender Kreditverzug belastet Ehe, Haushalt und Liebschaften.",
                 "familyImpact": "Der Schuldturm schadet Ehe, Hausfrieden und der Stabilität von Liebschaften."
             },
+            "pregnancy": {
+                "banner": "Du erwartest ein Kind.",
+                "dueHint": "Voraussichtlicher Geburtstermin"
+            },
             "spouse": {
                 "title": "Beziehung",
                 "name": "Name",