feat: add manage currencies page (#887)

Fixes: #152

src/app/organization/organization.service.ts

@@ -166,6 +166,14 @@ export class OrganizationService {
     return this.http.get('/currencies');
   }
 
+  /**
+   * @param {any[]} currencies
+   * @returns {Observable<any>} Currencies data
+   */
+  updateCurrencies(currencies: any[]): Observable<any> {
+    return this.http.put('/currencies', {currencies});
+  }
+
   /**
    * @returns {Observable<any>} SMS Campaigns data
    */