Add Mesop enviornment to idx.google.com

[tymorton]

Is your feature request related to a problem? Please describe.
Feature

Describe the solution you'd like
Work with the https://idx.google.com team to add mesop environment to do rapid dev work.
Describe alternatives you've considered
can be built on your own but not easily shareable with other users.

Additional context
Add any other context or screenshots about the feature request here.

[tymorton]

It looks like it could be started as a community effort then possibly moved into an idx supported template. https://github.com/project-idx/community-templates

[wwwillchen]

I tried setting up a custom IDX template for Mesop in #717 but I ran into quite a bit of flakiness with the IDX environment - I filed a bug with the IDX team, but I'm not sure if the issue has been fixed yet.

[richard-to]

Someone on the IDX team did respond to that bug. I totally forgot about it. But they did create this example IDX template here: https://github.com/prakhar1989/idx-templates/tree/main/mesop

I haven't had a chance to try it out.