Prepare the v0.0.66 release

Update docs structure to follow github recommendation:

"If you put your README file in your repository's hidden .github, root, or docs directory, GitHub will recognize and automatically surface your README to repository visitors."
then we don't have to use symlinked README.md with broken relative links.

Ref: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes

Change-Id: Ib2a7e3d7fbc203d9ce7aa65d318c7172190e0e72

Update CHANGELOG for v0.0.63 release

Change-Id: Ia82f1cc1f9c7b4b3ebaab4dbda87d08ce928dc68

Update zuul images to 13.1.0

Change-Id: Ib8598ba534592621bb1bb04de19ff587a99916ad

Merge "Update CHANGELOG for v0.0.61 release"

Release v0.0.60

Change-Id: I959ea5c41c2e85d44c64e57f25dc3c9bc41168c6

Release v0.0.59

Change-Id: I02a24f7cba7bc0fb07e4e678283a844ffdc9576b

Merge "Changelog update for v0.0.58"

release v0.0.57

Change-Id: I506fb2cbb98043cbc12f0833f8cbf7766864325b