Allowing projects with large files to be saved

[sfederici]

To avoid this problem https://scratch.mit.edu/projects/869052380 could large files be split when they are loaded in Scratch (with a warning dialog ok/cancel that explains what will be done?)

[CubesterYT]

Maybe have a system that detects if the file is to large, notify the user, and give them the option to discard, use anyways, or split it up for them (for the audio).

[DNin01]

Related PR: #6507

[WorldLanguages]

Yeah, we should highlight any sounds that exceed the limit. It's also probably feasible to split it automatically using the built-in sound module of Scratch.

[sfederici]

It would be similar to when someone loads an animated GIF and finds in the costume tab a full list of new costumes.