Add from_folder so users can convert generic folder full of pngs to RSI

[nuke-haus]

Let me know if i missed something, i'm not a big python user

[PJB3005]

This method is too specific to the one action in the RSI editor, IMO. It doesn't do any "proper" handling of images with directions/animations so I don't feel like this is a good method to have here.

[nuke-haus]

Yeah i agree that it needs to handle directions/animations but in order for that to work you'd need some sort of naming scheme that people would need to know about.

One possible way of doing it:

Animated sprites are like thing_01.png, thing_02.png, and so-on.
Directional sprites are like thing_N.png, thing_S.png, and so-on.

And if directional animations are doable then you'd combine the naming so it's thing_N_01, thing_N_02, etc.

[PJB3005]

You could something like what LibreOffice does when you try to import a CSV (which can have many different formats). Namely give you a preview and import options so you can select everything correctly.