feat: Add RaidableBases plugin config module — DB migration, NestJS CRUD, Vue editor

- Migration 021: raidablebases_configs table with JSONB config_data
- Entity, module, controller (7 endpoints), service with NATS deploy/import
- Frontend: 4-tab editor (General, Difficulty, NPC, Loot & Rewards)
- Pinia store, types, router route, sidebar nav with Swords icon
- Top 30 most common settings with actual RaidableBases.json key paths
- Difficulty sub-tabs for Easy/Medium/Hard/Expert/Nightmare with spawn day toggles

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-nest/src/app.module.ts

@@ -43,6 +43,7 @@ import { KitsModule } from './modules/kits/kits.module';
 import { FurnaceSplitterModule } from './modules/furnacesplitter/furnacesplitter.module';
 import { BetterChatModule } from './modules/betterchat/betterchat.module';
 import { TimedExecuteModule } from './modules/timedexecute/timedexecute.module';
+import { RaidableBasesModule } from './modules/raidablebases/raidablebases.module';
 
 // Shared Services
 import { NatsService } from './services/nats.service';
@@ -121,6 +122,7 @@ import { NatsBridgeGateway } from './gateways/nats-bridge.gateway';
     FurnaceSplitterModule,
     BetterChatModule,
     TimedExecuteModule,
+    RaidableBasesModule,
   ],
   providers: [
     // Global guards (order matters: auth first, then license, then permissions)