NadekoBot.Extensions should now be fully annotated with nullable reference types as well as many classes from NadekoBot.Common

src/NadekoBot/Services/Impl/SingleProcessCoordinator.cs

@@ -1,4 +1,5 @@
-using System.Diagnostics;
+#nullable disable
+using System.Diagnostics;
 
 namespace NadekoBot.Services;
 
@@ -53,4 +54,4 @@ public class SingleProcessCoordinator : ICoordinator
 
     public Task Reload()
         => Task.CompletedTask;
-}
+}