Replace hookdoc with WP Hooks Documentor

[peterwilsoncc]

Is your enhancement related to a problem? Please describe.

hookdocs uses an unmaintained dependency and should be replaced with WP Hooks Documentor

Designs

Use footer design from 10up/distributor#1337

Describe alternatives you've considered

No response

Code of Conduct

• I agree to follow this project's Code of Conduct