Revert "File scoped namespaces"

This reverts commit d31d8f574e.

Wino.Core.Domain/Exceptions/AuthenticationException.cs

@@ -1,17 +1,18 @@
 using System;
 
-namespace Wino.Core.Domain.Exceptions;
-
-/// <summary>
-/// All exceptions related to authentication.
-/// </summary>
-public class AuthenticationException : Exception
+namespace Wino.Core.Domain.Exceptions
 {
-    public AuthenticationException(string message) : base(message)
+    /// <summary>
+    /// All exceptions related to authentication.
+    /// </summary>
+    public class AuthenticationException : Exception
     {
-    }
+        public AuthenticationException(string message) : base(message)
+        {
+        }
 
-    public AuthenticationException(string message, Exception innerException) : base(message, innerException)
-    {
+        public AuthenticationException(string message, Exception innerException) : base(message, innerException)
+        {
+        }
     }
 }