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/associations.js

@@ -379,6 +379,8 @@ export default function setupAssociations() {
   FalukantCharacter.belongsTo(RegionData, { foreignKey: 'regionId', as: 'region' });
   RegionData.hasMany(FalukantCharacter, { foreignKey: 'regionId', as: 'charactersInRegion' });
 
+  FalukantCharacter.belongsTo(FalukantCharacter, { foreignKey: 'pregnancyFatherCharacterId', as: 'pregnancyFather' });
+
   FalukantStock.belongsTo(FalukantStockType, { foreignKey: 'stockTypeId', as: 'stockType' });
   FalukantStockType.hasMany(FalukantStock, { foreignKey: 'stockTypeId', as: 'stocks' });