Move RestConnection to Discord.Net.Rest

src/Discord.Net.Rest/Entities/Users/RestConnection.cs

@@ -3,7 +3,7 @@ using System.Collections.Immutable;
 using System.Diagnostics;
 using Model = Discord.API.Connection;
 
-namespace Discord
+namespace Discord.Net.Rest
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
     public class RestConnection : IConnection