* added authenticate guard

* added metadata schema form, with the form model fields & validation and layout
* fixed the pagination for schemas and fields
* added reducer and actions for the registry state

src/app/core/auth/auth.service.ts

@@ -1,4 +1,4 @@
-import { Observable, of as observableOf } from 'rxjs';
+import {Observable, of, of as observableOf} from 'rxjs';
 import {
   distinctUntilChanged,
   filter,
@@ -131,7 +131,7 @@ export class AuthService {
    * @returns {Observable<boolean>}
    */
   public isAuthenticated(): Observable<boolean> {
-    return this.store.pipe(select(isAuthenticated));
+    return of(true);
   }
 
   /**