refactor: add .editorconfig and refactor code

Endpoint/Configuration/Validation/SetupTokenService.cs

@@ -14,8 +14,8 @@ public class SetupTokenService : ISetupToken
 
         var token2 = Token.Value.Span;
 
-        int result = 0;
-        for (int i = 0; i < Token.Value.Length; i++)
+        var result = 0;
+        for (var i = 0; i < Token.Value.Length; i++)
             result |= token2[i] ^ token[i];
 
         return result == 0;