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

src/NadekoBot/Common/Replacements/Replacer.cs

@@ -1,4 +1,5 @@
-using System.Text.RegularExpressions;
+#nullable disable
+using System.Text.RegularExpressions;
 
 namespace NadekoBot.Common;
 
@@ -89,4 +90,4 @@ public class Replacer
 
         return newEmbedData;
     }
-}
+}