- 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/Settings/ConfigServiceBase.cs

@@ -44,10 +44,8 @@ public abstract class ConfigServiceBase<TSettings> : IConfigService
     }
 
     private void PublishChange()
-    {
-        _pubSub.Pub(_changeKey, _data);
-    }
-        
+        => _pubSub.Pub(_changeKey, _data);
+
     private ValueTask OnChangePublished(TSettings newData)
     {
         _data = newData;