Print on demand for works

[zkat]

Once we have the Works feature out, we could consider integrating with a Print on Demand provider for folks who might want physical prints of the art they just commissioned, for an additional fee (obvs). It would be great to have this directly integrated into Banchan, I think.

The big challenge here is to find something with competitive pricing that won't cause us much of a headache, which we've also validated the quality of. A lot of this is more of a business problem than a code problem, but there's still lots of code work to do.

Other thought: this should come with the ability for studios to configure whether and who gets to order prints: no prints allowed, commissioner only, anybody, or a specific list of users. All configured through the Work page