The Cursor and Codex plugin manifests had drifted from the engine
version because the previous `release-it` `after:bump` hook only
updated `.claude-plugin/plugin.json`. Replace the inline-JS hook with
`scripts/bump-plugin-versions.mjs`, which iterates every known plugin
manifest (Claude / Cursor / Codex plus the upcoming
`extension/package.json`) and skips any that don't yet exist. This
keeps every distribution channel in lockstep on subsequent releases.
Bring `.cursor-plugin/plugin.json` and `.codex-plugin/plugin.json` up
to v1.7.2 so they reflect the current engine release. Tidy up the
plugin descriptions in the same pass (replace decorative dashes with
colons, no semantic change).
Giancarlo Erra