Redesigns booking and resource architecture

Fundamentally refactors booking system to support:
- Split-resource bookings
- Service-level resource assignment
- Clear separation between booking and calendar events

Introduces new interfaces and type definitions to model complex booking scenarios, enabling more flexible and accurate resource management

Improves type safety by removing ambiguous type annotations

src/types/ColumnDataSource.ts

@@ -1,10 +1,12 @@
+import { IResource } from './ResourceTypes';
+
 /**
  * Column information container
  * Contains both identifier and actual data for a column
  */
 export interface IColumnInfo {
   identifier: string;      // "2024-11-13" (date mode) or "person-1" (resource mode)
-  data: Date | any;        // Date for date-mode, IResource for resource-mode
+  data: Date | IResource;  // Date for date-mode, IResource for resource-mode
 }
 
 /**