Revert "File scoped namespaces"

This reverts commit d31d8f574e.

Wino.Core.Domain/Entities/Mail/AccountSignature.cs

@@ -1,16 +1,17 @@
 using System;
 using SQLite;
 
-namespace Wino.Core.Domain.Entities.Mail;
-
-public class AccountSignature
+namespace Wino.Core.Domain.Entities.Mail
 {
-    [PrimaryKey]
-    public Guid Id { get; set; }
+    public class AccountSignature
+    {
+        [PrimaryKey]
+        public Guid Id { get; set; }
 
-    public string Name { get; set; }
+        public string Name { get; set; }
 
-    public string HtmlBody { get; set; }
+        public string HtmlBody { get; set; }
 
-    public Guid MailAccountId { get; set; }
+        public Guid MailAccountId { get; set; }
+    }
 }