Add new a2a call task to the specification and schema - #1114

Add new a2a call task to the specification and schema#1114

cdavernas merged 7 commits into

open-workflow-specification:mainopen-workflow-specification/specification:mainfrom

emmanuelallen:feat-a2a-taskemmanuelallen/serverless-workflow-specification:feat-a2a-taskCopy head branch name to clipboard