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/Common/ICloneable.cs

@@ -1,6 +1,7 @@
 namespace NadekoBot.Common;
 
-public interface ICloneable<T> where T : new()
+public interface ICloneable<T>
+    where T : new()
 {
     public T Clone();
 }