Enable code scanning default setup via a repository level API

[github-product-roadmap]

Summary

Code scanning default setup allows users to set up CodeQL analysis on a repository without the need to commit an Actions workflow file to the repository. This feature will now also be supported via an API at the repository level.

Intended Outcome

Let users programmatically set up code scanning default setup on repositories.

How will it work?

The public API will support setting up CodeQL default setup for a repository. Other forms of setup, such as a GitHub Actions workflow, will not be supported by the API. The API will be available at repository level.

[ankneis]

🚢 This has shipped to dotcom: https://github.blog/changelog/2023-03-21-code-scanning-api-to-enable-default-setup-with-codeql-on-a-repository/. Leaving open to track for GHES release.