Improve third party icon pack support

1. Make it easier to change icon packs without the need for Theme Park. It requires too many steps currently. It requires Good Lock and Theme Park > Create a Theme. 

My suggestion is to add the option for icon packs directly in the wallpaper and style menu. 

2. Many third party icon packs from the Play Store have support to change from light to dark icons (and vice-versa) automatically, based on the system theme. However, the Samsung OneUI launcher does not support this. Currently , in order to switch to a dark (or light) icons of an icon pack, I need to switch to the dark (or light) system theme, then make a new theme within theme park. It's not very intuitive. 

Please support this feature for custom icon packs.