kettle-family 1.2.90: More monorepo test execution modes

🏷️ release kettle-family 🏷️ 1.2.90

Version 1.2.90 adds aggregate and disposable-worktree execution modes for monorepo tests. Maintainers can select the execution model appropriate to the family rather than treating every member as an independent checkout.

Read the upstream release notes for the complete changes and see the project repository for usage and installation.