New docker extension self-publish process

[benja-M-1]

Hi @edithturn 👋

I am Ben from the Docker Extensions team 😃 In case you didn't know, we released a new way to publish your extension on the marketplace last week: https://docs.docker.com/desktop/extensions-sdk/extensions/publish/.

Would you be interested in submitting your extension?

[edithturn]

Wow, this is nice, Benjamin! Of course, I am :)