Release (#25)

* ci: stop swallowing errors in release step 5 (tag/release creation)\n\nReplace Out-Null with captured output so git tag, git push, and\ngh release errors are printed in red when they fail. This makes\nrelease failures diagnosable instead of silent."

* Badge : -> coverage -> Coverage

* docs: add Listed On section to README\n\nAdd recognition section above Credits linking to keycloak.org/extensions\nand awesome-keycloak where KETE is now listed."

* docs: rename Listed On to Recognition in README"

* docs: convert Recognition section to table format in README"

* docs: rename Recognition table header from Directory to Source"

* #22 - GcpPubSubDestination initialization fails — health check GETs Pub/Sub root URL which returns 404

Author: FortuneN