Add a new .github agent (pve-script-creator.agent.md) with workflow and strict rules for generating CT/install/json files. Remove legacy CT/install/json artifacts for alpine-ironclaw and openthread-br (ct/, install/, json/ entries deleted). Also adjust mqttx update logic: set CLEAN_INSTALL=1 and move the update msg_info after fetch_and_deploy_gh_release to ensure a clean deployment before reporting/updating and then run yarn build in the app web dir.
