feat(payment): enhance TwentyCard payment integration and update configuration

- Added support for optional Email and NationalId fields in PaymentRequest for TwentyCard transactions.
- Updated TwentyCardPaymentService to handle multipart/form-data requests and improved error handling.
- Modified appsettings and configuration files for both production and staging environments to include updated BaseUrl and credentials for TwentyCard.
- Updated README to reflect the new documentation location.

k8s/production/cms-config.yaml

@@ -24,6 +24,23 @@ stringData:
         "MerchantId": "4225d555-5fa9-4df0-9b61-1ce152cbbba8",
         "UseSandbox": false
       },
+      "TwentyCard": {
+        "BaseUrl": "https://gateway.20card.ir/ipg",
+        "TerminalId": "165674",
+        "TerminalUsername": "ea5y1biehi",
+        "TerminalPassword": "SaLamAT@1404!",
+        "CreditPortalUrl": "https://userpanel.20card.ir/",
+        "Packages": {
+          "4": {
+            "GatewayAmountToman": 9700000,
+            "WalletCreditToman": 13000000
+          },
+          "1": {
+            "GatewayAmountToman": 97000000,
+            "WalletCreditToman": 130000000
+          }
+        }
+      },
       "CmsBaseUrl": "https://cms.kbs2.ir",
       "FrontOfficeBaseUrl": "https://kbs2.ir",
       "JwtSecurityKey": "TvlZVx5TJaHs8e9HgUdGzhGP2CIidoI444nAj+8+g7c=",