[Github] support yml issue templates

[ericdallo]

For some reason the yml issue templates are not working on this repo.

Maybe @lukehefson can help us here?

I followed github documentation and gitpod issue template files.

[ericdallo]

Also, I added back the old md templates on this commit: a3cb37a

[ericdallo]

It seems this repo is not on the alpha program: gitpod-io/gitpod#3381 (comment)

[lukehefson]

Hey @ericdallo! I'm a little confused. Could you reiterate which orgs or repos you'd like in the alpha and I'll be happy to enable it for them.

[ericdallo]

Thanks for the help @lukehefson, our idea was to enable the issue form template on this repo: emacs-lsp/lsp-mode, do you think you could help us adding to the alpha program?

[lukehefson]

do you think you could help us adding to the alpha program?

Done!

[ericdallo]

Thank you very much! sorry for bothering you