Decouple UserType, add Role entity and management

Removed all UserType logic and references, replacing them with a new Role model and management system. Introduced RoleManager service, repository, and API endpoint for role CRUD operations. Updated user flows and JWT claims to use RoleCode. Removed admin-only user CRUD endpoints. Updated DI, documentation, and error handling for consistency. Appsettings and DTOs now reflect the new role-based approach.

Services/AltOptionManager/AltOptionManagerService.cs

@@ -160,7 +160,7 @@ public class AltOptionManagerService
 
             //exisiting one
 
-            var user = await _userRepository.GetUserByIdentifierAndType(identifier, null);
+            var user = await _userRepository.GetUserByIdentifierAndType(identifier);
 
             if (user == null)
                 throw new KeyNotFoundException("No user found with the provided identifier.");
@@ -293,7 +293,7 @@ public class AltOptionManagerService
             User? user = null;
             if (!string.IsNullOrWhiteSpace(identifier))
             {
-                user = await _userRepository.GetUserByIdentifierAndType(identifier, null);
+                user = await _userRepository.GetUserByIdentifierAndType(identifier);
             }
 
             if (user is null && userId.HasValue)
@@ -377,7 +377,7 @@ public class AltOptionManagerService
                         user.EmailVerified,
                         user.MobileNumberVerified,
                         user.IsMfaEnabled,
-                        UserTypeId = user.UserTypeId
+                        RoleId = user.RoleCode
                     }
                 }
             };