refactor(clients): clients list page

- use statuslookup.pipe to set styles to represent status of the client
- add button to import client and create client
- add server side pagination
- toggle show closed clients in table

src/app/clients/clients.service.ts

@@ -16,8 +16,13 @@ export class ClientsService {
    */
   constructor(private http: HttpClient) { }
 
-  getClients(): Observable<any> {
-    const httpParams = new HttpParams().set('orderBy', 'id');
+  getClients(orderBy: string, sortOrder: string, offset: number, limit: number): Observable<any> {
+    const httpParams = new HttpParams()
+      .set('offset', offset.toString())
+      .set('limit', limit.toString())
+      .set('sortOrder', sortOrder)
+      .set('orderBy', orderBy);
+
     return this.http.get('/clients', { params: httpParams });
   }