please co-publish on open-vsx

[GitMensch]

Please make this extension available to Open VSX marketplace, this will also make it directly available for VSCodium and Gitpod.

Open VSX is a vendor-neutral open-source alternative to the Visual Studio Marketplace. It provides a server application that manages VS Code extensions in a database, a web application similar to the VS Code Marketplace, and a command-line tool for publishing extensions similar to vsce.

There is a guide for publishing and after the initial setup it is just a matter of osvx publish (similar to the MS marketplace).

If wanted then there are github actions that can publish to both marketplaces on tagging.