* feat: addantigravity-skill-orchestrator for Auto-selecting best suited skills for the task, a skill-orchestrator * feat: update antigravity-skill-orchestrator metadata and documentation * fix: normalize orchestrator references and sync registry --------- Co-authored-by: wahid <wahid.shaikh@crimsoni.com> Co-authored-by: sck_0 <samujackson1337@gmail.com>