add calendar settings

src/app/services/calendar-settings-service.ts

@@ -0,0 +1,9 @@
+import { Injectable, signal } from '@angular/core';
+
+@Injectable({
+	providedIn: 'root',
+})
+export class CalendarSettingsService {
+	readonly showWeekNumbers = signal(false);
+	readonly samediMalin = signal(true);
+}