feat: add edit holiday component (#783)

Fixes: #750

src/app/organization/holidays/holiday-template.resolver.ts

@@ -0,0 +1,30 @@
+/** Angular Imports */
+import { Injectable } from '@angular/core';
+import { Resolve, ActivatedRouteSnapshot } from '@angular/router';
+
+/** rxjs Imports */
+import { Observable } from 'rxjs';
+
+/** Custom Services */
+import { OrganizationService } from 'app/organization/organization.service';
+
+/**
+ * Holiday data template resolver.
+ */
+@Injectable()
+export class HolidayTemplateResolver implements Resolve<Object> {
+
+  /**
+   * @param {OrganizationService} organizationService Organization service.
+   */
+  constructor(private organizationService: OrganizationService) {}
+
+  /**
+   * Returns the holiday data.
+   * @returns {Observable<any>}
+   */
+  resolve(): Observable<any> {
+    return this.organizationService.getHolidayTemplate();
+  }
+
+}