We used this to run vscodevim in the browser but it now has a version
that is able to run as a VS Code web extension. This does require an
update to our marketplace, however.
Add a short message above the search box on the Extensions panel. This
helps explain the extension divergence to the user.
If they click dismiss, it stores an item in localStorage to prevent the
message from showing up on subsequent loads.
Co-authored-by: Asher <ash@coder.com>
