Support download of other formats than .stl

[GoTVm]

As the title says, it would be useful if the extension allowed you to also download .scad, .f3d, .3mf and other common formats that people might have uploaded.

[stephancasas]

Hello, and thank you for the suggestion.

The original intention was to include all files, but I found that non-STL files did not resolve in the same way that STL files did. In the snippet below, you can actually see where all files are included, but are filtered-out to prevent sending the user to a 404 error:

thingiverse-stl-downloader/src/popup.js

Lines 22 to 24 in c63045f

	files = JSON.parse(currentThing).thing.files.filter(
	(file) => file.name.split('.').slice(-1)[0].toLowerCase() === 'stl',
	);

If I get some time, I'd like to do a little more digging, and enable the downloading of these files, so I'll keep the issue open, and try to figure out something this weekend.

Thanks!