Automate doc generation with buildkite pipeline

[golanglemonade]

Using buildkite, add a pipeline that will run the task generate command and create a PR with changes.

• Should be triggered on new tags of core
• PR title should include the tag from core that the docs are based on
• Nice to have: link to the diff of core in the PR description

See prior art of creating PRs in the core repo: https://github.com/theopenlane/core/tree/main/.buildkite/templates/github

Depends on #64 for a clean build

[emmrys-jay]

Hi @golanglemonade, looks very interesting, I'll like to work on this. Please assign it to me.

[golanglemonade]

Thanks @emmrys-jay! Let me know if you have any questions.