Add support for the Zed editor

[ghuh]

Zed's docker extension currently uses https://github.com/rcjsuen/dockerfile-language-server
and Zed's compose extension currently uses https://github.com/microsoft/compose-language-service

It would be nice if Zed also supported the official docker-language-server. Zed only supports language servers through extensions so there is no way to manually add support. Either another extension needs to be added to Zed or the two extensions above need to be updated.

[rcjsuen]

@ghuh Thanks for raising this. I opened issues in both repositories previously (zed-extensions/dockerfile#22 and eth0net/zed-docker-compose#9) but there hasn't been any movement yet. I think we'll need to create our own pull request if we want to move forward with this.