add a shared R/Python site, move R site to /r/

[simonpcouch]

My goals with this site were:

• Should not feel vibe-coded.
• Make it easy as possible to get to the R/Python documentation quickly
• In terms of feel, be halfway between Quarto / a scientific document and a modern site.

shared-site.mov

The content is essentially the announcement post without the "Announcing" language. The "Python" button links to /pkg-r on GitHub, for now.

[github-actions]

Preview deployed to Connect (dogfood.team.pct.posit.it): https://dogfood.team.pct.posit.it/connect/#/apps/d7a36cae-8f27-448b-a478-61b81fbe3942/draft/370177

Deployed from commit 077e0cb.

[github-actions]

Preview deployed to Connect (connect.staging.pct.posit.it): https://connect.staging.pct.posit.it/connect/#/apps/ad662e1b-5048-4acc-9ad7-f9478c92274e/draft/2890

Deployed from commit 077e0cb.

[jat255]

LGTM! I have a slight worry about the hand-built HTML getting out of sync at some point, so at some point I think we should have an action that builds pkgdown, quartodoc for python (when those docs exist), and then the main page. I think this is fine for now though.

[skaltman]

looks good to me! I do think we should sync all the trust flow diagrams to use the new one that you made. It makes more sense. But that doesn't have to happen here.