[CLO] Add a dependency policy

[MrAlias]

Provides a policy that describes how dependencies are consumed and updated.

The url of the dependencies policy needs to be made available in the dependencies > env-dependencies-policy section of the OpenSSF Security Insights manifest file (SECURITY-INSIGHTS.yml) that should be located at the root of the repository.

Documentation: https://clomonitor.io/docs/topics/checks/#dependencies-policy