[Feature]: Add-Ons should have their own JavaScript context

[cwisniew]

Feature Request

Add-Ons should create -- and destroy -- a JavaScript context that is tied to the add-on. JavaScript that is run as part of the add-on should run with this context so that all symbols are isolated from other add-ons.

The Solution you'd like

The following criteria should be met

• When the add-on is imported a JavaScript context should be created.
• When the add-on is removed the JavaScript context should be removed.
• When the add-on is created the JavaScript context should be removed and recreated.
• The JavaScript context should be isolated so other add-ons / scripts can not "fiddle" with the contets.

Alternatives that you've considered.

Not doing it and watching the ensuing chaos!

Additional Context

No response