💡 RFC: Full web environment support

[Princesseuh]

Background & Motivation

Right now when installing the Astro extension in a web VS Code environnement such as vscode.dev only HTML and CSS features are supported. It would be nice to support everything.

Help make it happen!

• I am willing to submit a PR to implement this change.
• I am willing to submit a PR to implement this change, but would need some guidance.
• I am not willing to submit a PR to implement this change.

[Princesseuh]

Interesting repo to check when we'll attack this: https://github.com/asafamr/svelte-vscode-web