Download Collections as zip

[catarak]

Once #43 is implemented, it would be nice to be able to download a collection as a zip. Then, for example, a teacher could easily upload all of the files to Github.

[catarak]

[slowizzm]

A download all sketches into a .zip would be nice also.

[MohdImran001]

Hi @catarak, I'd like to work on it.

[catarak]

@MohdImran001 go ahead!

[MohdImran001]

Hi @catarak, please review my PR.

[niemenjoki]

A download all sketches into a .zip would be nice also.

Hi @slowizzm,

I have created an unofficial implementation of this feature here.

Anyone in the p5 community can use my code if it helps adding the feature in the web editor.

[jht1493-gmail]

Thanks @jnsjknn p5-project-downloader, close to what I'm looking for.
Ideally i'd like to keep local copy of sketches in sync with online version.