- 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/Impl/BehaviorExecutor.cs

@@ -12,9 +12,7 @@ public sealed class BehaviorExecutor : IBehaviourExecutor, INService
     private IEnumerable<IInputTransformer> _transformers;
 
     public BehaviorExecutor(IServiceProvider services)
-    {
-        _services = services;
-    }
+        => _services = services;
 
     public void Initialize()
     {