feat(stackone): add StackOne AI integration#3

ryoppippi wants to merge 26 commits intomainStackOneHQ/pydantic-ai:mainfrom

ENG-10848-try-to-get-listed-as-third-party-toolset-on-pydanticStackOneHQ/pydantic-ai:ENG-10848-try-to-get-listed-as-third-party-toolset-on-pydanticCopy head branch name to clipboard