Updated the album creation code

We fully updated the album management (album basics such as credits, title, price, description, etc… and album preorder scheduling, streaming rules, as well as manual fulfillment) code to be simpler and easier to change going forward.

Ideally, this is of no impact to you but if there are any oddities or UI quirks when creating or managing an album, please let us know! Reach out on discord or [email protected].