No source lives here (the plugin is built in the private tile monorepo), so
the meaningful check is release integrity, not a build: manifest required
fields, manifest version present in versions.json with a matching
minAppVersion, and that the bundled main.js parses. Adds scripts/test.sh (the
single local entrypoint) and a CI workflow that runs it — matching the CVER
per-repo standard, scoped to what a publish repo can actually verify.
Co-authored-by: cverorg <292680828+cverorg@users.noreply.github.com>