- 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/Games/Common/Trivia/TriviaQuestion.cs

@@ -78,7 +78,7 @@ public class TriviaQuestion
         str = Regex.Replace(str, "^\\s+", "");
         str = Regex.Replace(str, "\\s+$", "");
         //Trim the really long answers
-        str = str.Length <= maxStringLength ? str : str.Substring(0, maxStringLength);
+        str = str.Length <= maxStringLength ? str : str[..maxStringLength];
         return str;
     }