Add NPC creation and titles retrieval functionality in Admin module

- Implemented createNPCs method in AdminController to handle NPC creation with specified parameters including region, age, title, and count.
- Added getTitlesOfNobility method in AdminController to retrieve available titles for users.
- Updated adminRouter to include new routes for creating NPCs and fetching titles.
- Enhanced navigationController and frontend localization files to support new NPC creation feature.
- Introduced corresponding UI components and routes for NPC management in the admin interface.

frontend/src/i18n/locales/en/admin.json

@@ -140,6 +140,27 @@
                 "errorAddingStock": "Error adding warehouse.",
                 "stockAdded": "Warehouse successfully added.",
                 "invalidStockData": "Please enter valid warehouse type and quantity."
+            },
+            "createNPC": {
+                "title": "Create NPCs",
+                "region": "City",
+                "allRegions": "All Cities",
+                "ageRange": "Age Range",
+                "to": "to",
+                "years": "years",
+                "titleRange": "Title Range",
+                "count": "Count",
+                "create": "Create NPCs",
+                "creating": "Creating...",
+                "result": "Result",
+                "createdCount": "{count} NPCs have been created.",
+                "age": "Age",
+                "errorLoadingRegions": "Error loading cities.",
+                "errorLoadingTitles": "Error loading titles.",
+                "errorCreating": "Error creating NPCs.",
+                "invalidAgeRange": "Invalid age range.",
+                "invalidTitleRange": "Invalid title range.",
+                "invalidCount": "Invalid count (1-100)."
             }
         },
         "chatrooms": {