Code editor card

[mturoci]

via @srini-x

Is your feature request related to a problem? Please describe

There is currently no card for live-coding apps.

Describe the solution you'd like

Provide a card with embedded monaco-editor or other suitable alternative.

Questions for discussion

What should a UI look like with best possible UX in mind? This includes:

• how/when would the card be saved
• how it should be marked as dirty

[lo5]

Including Monaco by default will bloat up our js bundle. Let's address after #297. In any case, we have this covered in #278.

[mturoci]

Including Monaco by default will bloat up our js bundle

Not necessarily, we can code split it via lazy loading the Monaco js module.

[srini-x]

@lo5 much simpler request, can we get an option to have the user entered text in multi-line textbox formatted in monospace font?
This will handle all the cases where user wants to enter a code snippet.