Extension ui idea

[Angelk90]

It would be nice if extensions (that are not theming or language recognition related) could be easily started via a modal. The user could simply type the name of the extension and start it, or select it from the list and click a button to start it.

Once started, a sort of tab dedicated to the extension should open, inside which the extension itself is executed.

In this tab, it would be nice to be able to use gpui components, for example to display data in a table or to insert a button that executes a command on click.