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/PreRegistrationsPage.tsx

@@ -98,7 +98,7 @@ export default function PreRegistrationsPage() {
       </div>
 
       <div className="card" style={{ padding: 0, overflow: 'hidden' }}>
-        <table className="t">
+        <div className="table-wrap"><table className="t">
           <thead>
             <tr>
               <th>نام</th>
@@ -186,7 +186,7 @@ export default function PreRegistrationsPage() {
                   );
                 })}
           </tbody>
-        </table>
+        </table></div>
       </div>
 
       <Pagination page={page} total={total} limit={limit} onPageChange={setPage} />