Add other NFTs as possible Backgrounds to the Dorkis Builder

I noticed the announcement about the Dorkis Builder today, and immediately thought it might be interesting to add some of the more abstract NFT projects as possible Background choices for the Dork Builder, to have an easy way to customize ones Dorkie !

My own proposal would be to add Danil Pan's SKIES Project ( https://opensea.io/collection/s-k-i-e-s ), as it is specifically created with the idea of being a background for other PFP projects !

The exact implementation details can be determined later (whether using the same add by ID system as with Dork backgrounds, or adding a wallet connection possibility so we can select those pieces that we own).

I added a YAY and NAY option for the general concept of using other NFTs as backgrounds, as well as a separate choice for SKIES ( you can choose both YAY and SKIES, if you wish ).