Remove resource calendar mode support

Simplifies calendar configuration and removes resource-specific code paths

Eliminates complexity around resource-based calendar rendering by:
- Removing ResourceCalendarData type
- Removing resource-specific renderers and managers
- Streamlining event and grid management logic
- Consolidating to single date-based calendar implementation

src/types/ManagerTypes.ts

@@ -31,7 +31,6 @@ export interface EventManager extends IManager {
   loadData(): Promise<void>;
   getEvents(): CalendarEvent[];
   getEventsForPeriod(startDate: Date, endDate: Date): CalendarEvent[];
-  getResourceData(): ResourceData | null;
   navigateToEvent(eventId: string): boolean;
 }
 
@@ -42,7 +41,6 @@ export interface EventRenderingService extends IManager {
 export interface GridManager extends IManager {
   render(): Promise<void>;
   getDisplayDates(): Date[];
-  setResourceData(resourceData: import('./CalendarTypes').ResourceCalendarData | null): void;
 }
 
 export interface ScrollManager extends IManager {
@@ -76,20 +74,3 @@ export interface AllDayManager extends IManager {
 export interface ResizeHandleManager extends IManager {
   // ResizeHandleManager handles hover effects for resize handles
 }
-
-export interface ResourceData {
-  resources: Resource[];
-  assignments?: ResourceAssignment[];
-}
-
-export interface Resource {
-  id: string;
-  name: string;
-  type?: string;
-  color?: string;
-}
-
-export interface ResourceAssignment {
-  resourceId: string;
-  eventId: string;
-}