Revert "File scoped namespaces"

This reverts commit d31d8f574e.

Wino.Core.Domain/Interfaces/IThreadingStrategyProvider.cs

@@ -1,12 +1,13 @@
 using Wino.Core.Domain.Enums;
 
-namespace Wino.Core.Domain.Interfaces;
-
-public interface IThreadingStrategyProvider
+namespace Wino.Core.Domain.Interfaces
 {
-    /// <summary>
-    /// Returns corresponding threading strategy that applies to given provider type.
-    /// </summary>
-    /// <param name="mailProviderType">Provider type.</param>
-    IThreadingStrategy GetStrategy(MailProviderType mailProviderType);
+    public interface IThreadingStrategyProvider
+    {
+        /// <summary>
+        /// Returns corresponding threading strategy that applies to given provider type.
+        /// </summary>
+        /// <param name="mailProviderType">Provider type.</param>
+        IThreadingStrategy GetStrategy(MailProviderType mailProviderType);
+    }
 }