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

src/NadekoBot/Common/AsyncLazy.cs

@@ -1,4 +1,5 @@
-using System.Runtime.CompilerServices;
+#nullable disable
+using System.Runtime.CompilerServices;
 
 namespace NadekoBot.Common;
 
@@ -16,4 +17,4 @@ public class AsyncLazy<T> : Lazy<Task<T>>
 
     public TaskAwaiter<T> GetAwaiter()
         => Value.GetAwaiter();
-}
+}