- installer: surface a clear error when the GraalVM Community releases
listing is not a JSON array, instead of silently treating an error
payload (rate limit, auth failure, etc.) as "no releases" which later
surfaced as a misleading "version not found" error.
- docs: fix the GraalVM Community advanced-usage example to check the
installed binary versions (java/native-image --version) rather than
running a non-existent HelloWorldApp classpath that fails when copied.
- tests: cover the new non-array release listing error path.
Rebuilt dist bundle.
Co-authored-by: Copilot <[email protected]>
