chore(config): update CreditPortalUrl in appsettings files and clean up .gitignore

- Changed the CreditPortalUrl in appsettings.json, appsettings.Production.json, and appsettings.Staging.json to point to the new user panel URL.
- Removed an unnecessary blank line from the .gitignore file to maintain consistency.

These updates ensure correct configuration for the TwentyCard integration and improve the project's file management.

.gitignore

@@ -3,7 +3,7 @@
 ## files generated by popular Visual Studio add-ons. 
 ##
 ## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore 
-
+ 
 # User-specific files
 *.rsuser
 *.suo

src/FrontOffice.Main/appsettings.Production.json

@@ -2,7 +2,7 @@
   "GwUrl": "https://cms.kbs1.ir",
   "DownloadUrl": "",
   "TwentyCard": {
-    "CreditPortalUrl": "https://20card.ir"
+    "CreditPortalUrl": "https://userpanel.20card.ir/"
   },
   "EncryptionSettings": {
     "Key": "kmcQ3XTmH4mrdh8VHziuscyf8LLYjG//Kyni81nH/0E=",

src/FrontOffice.Main/appsettings.Staging.json

@@ -7,7 +7,7 @@
   "GwUrl": "https://cms.se.kbs1.ir",
   "DownloadUrl": "",
   "TwentyCard": {
-    "CreditPortalUrl": "https://20card.ir"
+    "CreditPortalUrl": "https://userpanel.20card.ir/"
   },
   "EncryptionSettings": {
     "Key": "kmcQ3XTmH4mrdh8VHziuscyf8LLYjG//Kyni81nH/0E=",

src/FrontOffice.Main/appsettings.json

@@ -7,7 +7,7 @@
   "GwUrl": "https://cms.se.kbs1.ir",
   "DownloadUrl": "",
   "TwentyCard": {
-    "CreditPortalUrl": "https://20card.ir"
+    "CreditPortalUrl": "https://userpanel.20card.ir/"
   },
   "EncryptionSettings": {
     "Key": "kmcQ3XTmH4mrdh8VHziuscyf8LLYjG//Kyni81nH/0E=",