Adds `gbrgames export`, which builds the games_published payload from
every game.yaml, and a CI step that posts it to the panel webhook after
validation on main. Unlike the node-agent notify, a failed publish fails
the run so stale templates in the panel never go unnoticed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Public game templates for GBR Hosting, one games/<id>/game.yaml per game,
imported from the panel. A Go tool validates them against JSON Schemas and
checks for credentials, private addresses and consents that default to
accepted; CI runs it on every push.
Admin/RCON passwords are no longer shared defaults: they are blank with
x-generate so the panel creates one per server, and Palworld/ARK no longer
publish their RCON/REST ports.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>