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.

backend/models/falukant/data/character.js

@@ -45,6 +45,14 @@ FalukantCharacter.init(
         min: 0,
         max: 100
       }
+    },
+    pregnancyDueAt: {
+      type: DataTypes.DATE,
+      allowNull: true,
+    },
+    pregnancyFatherCharacterId: {
+      type: DataTypes.INTEGER,
+      allowNull: true,
     }
   },
   {