feat: add view employee component (#546)

Fixes: #534

src/app/organization/organization.service.ts

@@ -55,6 +55,14 @@ export class OrganizationService {
     return this.http.post('/staff', employee);
   }
 
+  /**
+   * @param {string} employeeId Employee ID of employee.
+   * @returns {Observable<any>} Employee.
+   */
+  getEmployee(employeeId: string): Observable<any> {
+    return this.http.get(`/staff/${employeeId}`);
+  }
+
   /**
    * @returns {Observable<any>} Currencies data
    */