Add release, star count, and CI status badges to README

Release badge points at github.com/Psalm2517/Cindermail/releases and
auto-updates on future tags. No Workers Builds badge: verified against
Cloudflare's docs, they don't expose a public status badge endpoint
for it the way GitHub Actions does, so faking one wasn't an option.
The existing CI badge already covers typecheck+test status.

nccommitted 3 months agoparent 42557a1f53d21b6b1ef8b1031dd491d7bfc7ab2ea4af15fBrowse files