Revert "File scoped namespaces"

This reverts commit d31d8f574e.

Wino.Core.Domain/Exceptions/GoogleAuthenticationException.cs

@@ -1,6 +1,7 @@
-namespace Wino.Core.Domain.Exceptions;
-
-public class GoogleAuthenticationException : System.Exception
+namespace Wino.Core.Domain.Exceptions
 {
-    public GoogleAuthenticationException(string message) : base(message) { }
+    public class GoogleAuthenticationException : System.Exception
+    {
+        public GoogleAuthenticationException(string message) : base(message) { }
+    }
 }