- More code cleanup and codestyle updates

- Fixed some possible nullref exceptions
- Methods signatures now have up to 3 parameters before breakaing down each parameter in a separate line
- Method invocations have the same rule, except the first parameter will be in the same line as the invocation to prevent some ugliness when passing lambas as arguments
- Applied many more codestyles
- Extensions folder fully reformatted

src/NadekoBot/Modules/Gambling/Common/AnimalRacing/AnimalRacingUser.cs

@@ -18,14 +18,10 @@ public class AnimalRacingUser
     }
 
     public override bool Equals(object obj)
-    {
-        return obj is AnimalRacingUser x
+        => obj is AnimalRacingUser x
             ? x.UserId == this.UserId
             : false;
-    }
 
     public override int GetHashCode()
-    {
-        return this.UserId.GetHashCode();
-    }
+        => this.UserId.GetHashCode();
 }