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

src/NadekoBot/Common/LbOpts.cs

@@ -1,4 +1,5 @@
-using CommandLine;
+#nullable disable
+using CommandLine;
 
 namespace NadekoBot.Common;
 
@@ -14,4 +15,4 @@ public class LbOpts : INadekoCommandOptions
     public void NormalizeOptions()
     {
     }
-}
+}