Live collaborative real-time editing feature request

Nature of issue?

• New feature request

New feature details:

In light of Covid19 and so many folks going to be teaching online, it would be amazing to implement a live collaborative editing feature into the editor.

Several other platforms have similar feature set, and it may make sense to migrate to them in the short term, but I think a discussion of this and if it's even possible with the current build would be amazing. Since so many of our classes are already using the editor, this feature would be major for continuing the classes as seamlessly as possible while adding a nice hands on way to help students debug code, and work together that's a little more fluid than a screen-share.

I think the most reasonable model to follow is glitch.com's 'Invite Others to Edit' link

open processing has recently implemented a similar feature:
https://twitter.com/openprocessing/status/1237901609314762754

atom.io has it's teletype package:
https://teletype.atom.io/

visual Studio has it's live share feature:
https://code.visualstudio.com/blogs/2017/11/15/live-share

Start by reviewing the editor's current architecture and assessing whether its existing build can support live collaborative editing. Use the Glitch, OpenProcessing, Atom Teletype, and Visual Studio Live Share examples as references, then define the collaboration model and a concrete scope before implementation.