[FEAT] - The ability to render dev/test cards by supplying a cards.txt (instead of image files in art folder)

[HelixVita]

Is your feature request related to a problem? Please describe.
The way I’m testing cards now is by just copy-pasting the exact same test picture, say, 100 times and giving it different names for the cards that I want to test. This is a bit tedious, and it increases the time it takes to develop and test new Proxyshop templates / plugins.

Describe the solution you'd like
I figure at this point it’d make more sense if it was possible to just feed Proxyshop a single txt file (essentially the same kind of "cards.txt" file that MTG-Art-Downloader uses). This would be a lot more simple than having to create 100 identical JPGs with different filenames.

To clarify. I’m not asking for a feature that automatically grabs the correct art from some repo. About 99% of the time I spend with Proxyshop is spent just testing and developing templates, so I don’t care about the art. Thus, as far as I'm concerned, they can all use the exact same sample image, for example the pumpkin patch one used in the test module.

As a bonus, I think having this kind of ability to run a render_all on a simple cards.txt file would make stuff like test-driven development and unit tests much easier. Not only for template creators, but for Proxyshop as a whole.

Just an idea, anyway.

Describe alternatives you've considered
Perhaps it's possible to get this functionality in Proxyshop by just expanding a bit on the functionality of the recently implemented "Dev Mode"? Aside from a few details, it seems pretty close to what I'm describing.