Refactors event rendering to be event-driven

Moves event rendering logic into a dedicated EventRenderer class that uses a strategy pattern for different calendar types.

The rendering is now triggered by `GRID_RENDERED` and `CONTAINER_READY_FOR_EVENTS` events, emitted by the GridManager and NavigationManager respectively.

This change decouples the CalendarManager from direct event rendering and allows for more flexible and efficient event updates. The EventManager now has a method to fetch events for a given time period.

Removes direct calls to event rendering from CalendarManager. Improves animation transitions by using pre-rendered containers in the NavigationManager.

src/index.ts

@@ -36,10 +36,10 @@ async function initializeCalendar(): Promise<void> {
     // Create all managers
     console.log('📋 Creating managers...');
     calendarManager = new CalendarManager(eventBus, config);
-    navigationManager = new NavigationManager(eventBus);
+    navigationManager = new NavigationManager(eventBus);  // No EventRenderer dependency
     viewManager = new ViewManager(eventBus);
     eventManager = new EventManager(eventBus);
-    eventRenderer = new EventRenderer(eventBus);
+    eventRenderer = new EventRenderer(eventBus, eventManager);  // Pass EventManager
     gridManager = new GridManager();
     scrollManager = new ScrollManager();