Allow specifying a subdir for slidev

[mdbenito]

Currently slidev expects a package.json in the root of the repository. However, some projects which might not be js-based and use sli.dev for slides in a subfolder, won't have this. It would be very convenient to be able to tell the extension where to find the slides.

I have tried forcing "slidev.enabled": true in the workspace settings, but this has no effect.

Of course, opening that folder instead of the project root in vscode solves the problem.

Thanks for the extension!

[KermanX]

We've rewritten the VSCode extension for Slidev (slidevjs/slidev#1557). Upgrading the VSCode extension to the latest (0.49.1) can resolve this issue.