Feature request: Support More Markdown Language IDs

[TMA-2]

Proposal

While editing a Copilot prompt file (.prompt.md), I noticed the regular key bindings and commands were not available. I see there's a related setting (markdown.extension.extraLangIds) but it's an enum only allowing rmd and quarto.

The other Markdown language IDs I think should be added would be:

• chatmode
• instructions
• prompt

Other information

Obviously, besides the aforementioned setting, they'd need to be added to:

• activation events, e.g. onLanguage:chatmode
• command, keymap, etc. 'when' settings, e.g. editorLangId =~ /^(markdown|rmd|quarto|chatmode|instructions|prompt)$/

Thanks!

[klacol]

Hi, I do not see the preview for file with the ending *.prompt.md at all. I seems to be fixed to *.md. Can this be configured somewhere?