Restructured the project structure back to the way it was, there's no reasonable way to split the modules

src/NadekoBot/_common/Attributes/CmdAttribute.cs

@@ -0,0 +1,18 @@
+using System.Runtime.CompilerServices;
+
+namespace NadekoBot.Common.Attributes;
+
+[AttributeUsage(AttributeTargets.Method)]
+public sealed class CmdAttribute : CommandAttribute
+{
+    public string MethodName { get; }
+
+    public CmdAttribute([CallerMemberName] string memberName = "")
+        : base(CommandNameLoadHelper.GetCommandNameFor(memberName))
+    {
+        MethodName = memberName.ToLowerInvariant();
+        Aliases = CommandNameLoadHelper.GetAliasesFor(memberName);
+        Remarks = memberName.ToLowerInvariant();
+        Summary = memberName.ToLowerInvariant();
+    }
+}