Refactors calendar project structure and build configuration

Consolidates V2 codebase into main project directory
Updates build script to support simplified entry points
Removes redundant files and cleans up project organization

Simplifies module imports and entry points for calendar application

src/storage/teams/TeamService.ts

@@ -0,0 +1,44 @@
+import { ITeam, EntityType, IEventBus } from '../../types/CalendarTypes';
+import { TeamStore } from './TeamStore';
+import { BaseEntityService } from '../BaseEntityService';
+import { IndexedDBContext } from '../IndexedDBContext';
+
+/**
+ * TeamService - CRUD operations for teams in IndexedDB
+ *
+ * Teams define which resources belong together for hierarchical grouping.
+ * Extends BaseEntityService for standard entity operations.
+ */
+export class TeamService extends BaseEntityService<ITeam> {
+  readonly storeName = TeamStore.STORE_NAME;
+  readonly entityType: EntityType = 'Team';
+
+  constructor(context: IndexedDBContext, eventBus: IEventBus) {
+    super(context, eventBus);
+  }
+
+  /**
+   * Get teams by IDs
+   */
+  async getByIds(ids: string[]): Promise<ITeam[]> {
+    if (ids.length === 0) return [];
+    const results = await Promise.all(ids.map(id => this.get(id)));
+    return results.filter((t): t is ITeam => t !== null);
+  }
+
+  /**
+   * Build reverse lookup: resourceId → teamId
+   */
+  async buildResourceToTeamMap(): Promise<Record<string, string>> {
+    const teams = await this.getAll();
+    const map: Record<string, string> = {};
+
+    for (const team of teams) {
+      for (const resourceId of team.resourceIds) {
+        map[resourceId] = team.id;
+      }
+    }
+
+    return map;
+  }
+}