Support for web archiving services

[myl7]

Is your feature request related to a problem? Please describe. Currently at least Wayback Machine can not fully capture a web-served Slidev slide. If the app is friendly towards web archiving services, users can archive staticly served slides in these services and release occupied web resources to reduce costs.

Example: https://linux101-ch07-pre.vercel.app/ vs. https://web.archive.org/web/20220516080512/https://linux101-ch07-pre.vercel.app/

Describe the solution you'd like Maybe adding some metadata-like URLs to link all pages in the index page should be enough.

Describe alternatives you've considered As an alternative, users can build a slide to PDF and save it to archivers. But that requires to access the original project and do extra manual steps which is not efficient and does not seem automatable.