Databricks-labs-blueprint

* Make `find_project_root` more deterministic ([23](https://github.com/databrickslabs/blueprint/pull/23)).

* Make it work with `ucx` ([21](https://github.com/databrickslabs/blueprint/pull/21)).

* Fixed sigstore action ([19](https://github.com/databrickslabs/blueprint/pull/19)).

* Sign artifacts with Sigstore ([17](https://github.com/databrickslabs/blueprint/pull/17)).

* Added extensive library documentation ([14](https://github.com/databrickslabs/blueprint/pull/14)).
* Setup release to PyPI via GitHub OIDC ([15](https://github.com/databrickslabs/blueprint/pull/15)).

* Added `.codegen.json` and `CHANGELOG.md` templates for automated releases.
* Added `CODEOWNERS` for code governance.
* Added command framework for Databricks CLI launcher frontend ([10](https://github.com/databrickslabs/blueprint/pull/10)).
* Added ProductInfo unreleased version fallback ([9](https://github.com/databrickslabs/blueprint/pull/9)).