Added and applied styles for private readonly fields, private fields to Extensions and Common folders.

- Some renamings and code cleanups
- Chained method calls, binary expressions and binary patterns will now break into newlines
- Type param constraints and base constructor calls will be on the new line

src/NadekoBot/Modules/Games/Common/TypingGame.cs

@@ -133,8 +133,7 @@ public class TypingGame
             {
                 if (imsg.Author.IsBot)
                     return;
-                var msg = imsg as SocketUserMessage;
-                if (msg is null)
+                if (imsg is not SocketUserMessage msg)
                     return;
 
                 if (this.Channel is null || this.Channel.Id != msg.Channel.Id) return;