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>

frontend/src/router/index.ts

@@ -150,6 +150,11 @@ const panelRoutes: RouteRecordRaw[] = [
         name: 'timed-execute',
         component: () => import('@/views/admin/TimedExecuteView.vue'),
       },
+      {
+        path: 'raidable-bases',
+        name: 'raidable-bases',
+        component: () => import('@/views/admin/RaidableBasesView.vue'),
+      },
       {
         path: 'wipes',
         name: 'wipes',