Rework the way DXVK toggle works

[Sultech]

Is your feature request related to a problem? Please describe.
Every time you have Auto Install/Update DXVK on Prefix enabled the game will take forever to launch because it is updating dxvk in a different way to lutris (I don't understand how heroic does it but lutris does it better).

Describe the solution you'd like
A better way of doing this would be to copy the way lutris does it. Lutris has versions of dxvk that will automatically be updated in a folder. A runtime folder where dxvk, vkd3d, and dxvk-nvapi are located.

Then if you enable dxvk it will rename the wineD3D files to .old then symlink the dxvk dlls and paste them in the prefix folder. By using this the game will open instantly without having to wait. Also you could add version numbers so you are able to change to which version you want to use.

It would also be a good idea to separate dxvk and vkd3d as they are not the same thing.

Additional context
Here is a screenshot from lutris

[flavioislima]

Yes, this is another thing that needs to be improved in the future. I already had take a look at lutris source code and I could do it in a similar way.
The problem is find time to work on everything 😅