Adds work week configuration feature

Implements configurable work week presets, allowing users to customize the days displayed in the calendar.

This includes:
- Defining work week settings (work days, day names, total days).
- Providing predefined work week presets (standard, compressed, weekend, full week).
- Adding UI elements to switch between presets.
- Updating grid and header rendering logic to reflect the selected work week.
- Emitting events when the work week changes, triggering necessary UI updates and data re-renders.

This provides a more flexible and personalized calendar experience.

src/managers/NavigationManager.ts

@@ -2,6 +2,7 @@ import { IEventBus } from '../types/CalendarTypes.js';
 import { DateUtils } from '../utils/DateUtils.js';
 import { EventTypes } from '../constants/EventTypes.js';
 import { NavigationRenderer } from '../renderers/NavigationRenderer.js';
+import { calendarConfig } from '../core/CalendarConfig.js';
 
 /**
  * NavigationManager handles calendar navigation (prev/next/today buttons)
@@ -17,7 +18,7 @@ export class NavigationManager {
   constructor(eventBus: IEventBus) {
     console.log('🧭 NavigationManager: Constructor called');
     this.eventBus = eventBus;
-    this.navigationRenderer = new NavigationRenderer(eventBus);
+    this.navigationRenderer = new NavigationRenderer(eventBus, calendarConfig);
     this.currentWeek = DateUtils.getWeekStart(new Date(), 0); // Sunday start like POC
     this.targetWeek = new Date(this.currentWeek);
     this.init();