Applied codestyle to all .cs files

src/NadekoBot/Common/CmdStrings.cs

@@ -1,4 +1,4 @@
-#nullable disable
+#nullable disable
 using Newtonsoft.Json;
 
 namespace NadekoBot.Common;
@@ -14,4 +14,4 @@ public class CmdStrings
         Usages = usages;
         Description = description;
     }
-}
+}