refactor: move optimizer and SubagentInvocation to pytest-aitest; consolidate subagent tool factories#14

sbroenne merged 1 commit intomainsbroenne/pytest-codingagents:mainfrom

refactor/move-optimizer-subagent-to-aitestsbroenne/pytest-codingagents:refactor/move-optimizer-subagent-to-aitestCopy head branch name to clipboard