* fix(ui): move Comments/CommentForm to emdash/ui/comments subpath (#2039)
Their <style> blocks were pulled into a shared, render-blocking CSS chunk
on every page that imported anything from the emdash/ui barrel (e.g.
PortableText), because Astro scans the whole barrel module graph. Splitting
them into a dedicated entry point keeps comment CSS off pages that don't
render comments, mirroring the existing emdash/ui/search entry point.
* fix(ui): keep barrel Comments exports as deprecated (#2039)
Address ascorbic review: add emdash/ui/comments without breaking existing
emdash/ui imports. Mark barrel re-exports @deprecated (remove in 1.0),
allowlist the subpath in the public-source guard, and sync template skills.
Scott Buscemi
534f23884f