- 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/Services/strings/impl/BotStrings.cs

@@ -90,9 +90,7 @@ public class BotStrings : IBotStrings
     }
 
     public void Reload()
-    {
-        _stringsProvider.Reload();
-    }
+        => _stringsProvider.Reload();
 }
 
 public class CommandStrings