Add NPC creation status tracking and progress reporting in Admin module

- Implemented getNPCsCreationStatus method in AdminController to retrieve the status of NPC creation jobs.
- Enhanced AdminService to manage NPC creation jobs, including job ID generation, progress updates, and error handling.
- Updated frontend CreateNPCView to display progress of NPC creation, including estimated time remaining and job status.
- Added localization strings for progress reporting in both German and English.
- Improved overall user experience by providing real-time feedback during NPC creation processes.

backend/routers/adminRouter.js

@@ -47,6 +47,7 @@ router.get('/falukant/region-distances', authenticate, adminController.getRegion
 router.post('/falukant/region-distances', authenticate, adminController.upsertRegionDistance);
 router.delete('/falukant/region-distances/:id', authenticate, adminController.deleteRegionDistance);
 router.post('/falukant/npcs/create', authenticate, adminController.createNPCs);
+router.get('/falukant/npcs/status/:jobId', authenticate, adminController.getNPCsCreationStatus);
 router.get('/falukant/titles', authenticate, adminController.getTitlesOfNobility);
  
 // --- Minigames Admin ---