[image gen] allow overlays onto cards while drawing

[tobyers]

Description of the changes

I've updated the image_gen.py functionality so it allows for overlays onto the collector_card section of the image, this allows for cooler, 3D designs which can include different light effects, filters, or other overlayed features.

Were the changes in this PR tested?

• Yes
• No

To test:

• See if all variables are set correctly
• Not all the variables are required for the base bot
• Test to see if images are drawn at correct size
• Check that regular non-overlayed images still function normally

[flaree]

This drastically changes the defaults of the generator, it should be done in a way that if there's no changes then someone wouldn't notice. also it saves back to PNG which you shouldn't due - keep it as WEBPAGE due to its compression

[dormieriancitizen]

Perhaps I'm biased, but I would prefer #740 and then these sorts of changes (which are cool) could be easily be implemented by a renderer in a third party package

[tobyers]

This drastically changes the defaults of the generator, it should be done in a way that if there's no changes then someone wouldn't notice. also it saves back to PNG which you shouldn't due - keep it as WEBPAGE due to its compression

I didn’t realise how many things actually changed from the base bot - I built this feature for the MonsterDex bot which already had some changes from the original BallsDex image generator code, it’s really only 1 block that would need changing. I’ll look over and compare this to the original image_gen.py code and attempt to make a more coherent version 👍

[tobyers]

Perhaps I'm biased, but I would prefer #740 and then these sorts of changes (which are cool) could be easily be implemented by a renderer in a third party package

It’s really not a massive change, I think I made it seem like more than it is accidentally lmao

I plan on revising the code and re-releasing a better version to be more easily compatible