Add JSON files for Payment Gateway Interface and API documentation updates

- Created a new JSON file for the PaymentGatewayInterface.php, detailing its methods and return types.
- Added a JSON file for payment.md, documenting various API endpoints and their parameters, responses, and errors.
- Introduced a JSON file for fix-admin-modal-and-calendar.md, outlining issues and solutions related to admin modal and calendar functionalities.

assets/admin/pages/AppointmentsPage.tsx

@@ -199,7 +199,7 @@ function TableView({
 
   return (
     <div style={{ overflowX: 'auto' }}>
-      <table style={{ width: '100%', borderCollapse: 'collapse', fontSize: 13 }}>
+      <div className="table-wrap"><table style={{ width: '100%', borderCollapse: 'collapse', fontSize: 13 }}>
         <thead>
           <tr style={{ borderBottom: '1px solid var(--border)', background: 'var(--surface-2)' }}>
             <th style={th}>ردیف</th>
@@ -241,7 +241,7 @@ function TableView({
             </tr>
           ))}
         </tbody>
-      </table>
+      </table></div>
     </div>
   );
 }