feat: workflows v2

[michael-desmond]

Which issue(s) does this pull-request address?

Addresses #1025

Description

Lightweight agent orchestration using decorators.

Checklist

General

• [x] I have read the appropriate contributor guide: Python / TypeScript
• [x] I have signed off on my commit: Python instructions / TypeScript instructions
• [x] Commit messages and PR title follow conventional commits
• [x] Appropriate label(s) added to PR: Python for Python changes, TypeScript for TypeScript changes

Code quality checks

• [x] Code quality checks pass: mise check (mise fix to auto-fix)

Testing

• [ ] Unit tests pass: mise test:unit
• [ ] E2E tests pass: mise test:e2e
• [ ] Tests are included (for bug fixes or new features)

Documentation

• [ ] Documentation is updated
• [ ] Embedme embeds code examples in docs. To update after edits, run: Python mise docs:fix