v0.9.0

Added

• Cowork, Claude desktop's local agent mode, as a harness.

---

• crates.io: https://crates.io/crates/txcript/0.9.0
• npm: https://www.npmjs.com/package/txcript/v/0.9.0
• docs.rs: https://docs.rs/txcript/0.9.0