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/de/navigation.json

@@ -62,7 +62,8 @@
                 "logentries": "Log-Einträge",
                 "edituser": "Benutzer bearbeiten",
                 "database": "Datenbank",
-                "mapEditor": "Karteneditor"
+                "mapEditor": "Karteneditor",
+                "createNPC": "NPCs erstellen"
             },
             "minigames": "Minispiele",
             "m-minigames": {