- 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/Searches/Common/AnimeResult.cs

@@ -20,5 +20,5 @@ public class AnimeResult
     public string AverageScore { get; set; }
 
     public string Link => "http://anilist.co/anime/" + Id;
-    public string Synopsis => Description?.Substring(0, Description.Length > 500 ? 500 : Description.Length) + "...";
+    public string Synopsis => Description?[..(Description.Length > 500 ? 500 : Description.Length)] + "...";
 }