feat: add data tables component (#336)

Fixes #170

src/app/system/system.service.ts

@@ -18,6 +18,13 @@ export class SystemService {
    */
   constructor(private http: HttpClient) { }
 
+  /**
+   * @returns {Observable<any>} Data tables.
+   */
+  getDataTables(): Observable<any> {
+    return this.http.get('/datatables');
+  }
+
   /**
    * @returns {Observable<any>} Fetches Codes.
    */