Publish to Open VSX

[felipecrs]

So we can use it in Gitpod right away :-).

The instructions are very straight forward, at the end you'll only need to add a new line to the pipeline (npx ovsx publish).

https://github.com/eclipse/openvsx/wiki/Publishing-Extensions

[brianking]

fyi this was published by @Majunko https://open-vsx.org/extension/foxundermoon/shell-format