Add readthedocs configuration

[oraNod]

SUMMARY

This PR adds Read The Docs configuration to host the content generated from docs/docsite/rst.

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• Docs

AWX VERSION

N/A

ADDITIONAL INFORMATION

N/A

[oraNod]

@AlanCoding Please take a look whenever you're ready.

A future improvement could be to add positional args to the tox command so we can pass something like python3 -m tox -e docs -- --strict --site-dir=_readthedocs/html/ instead of using the mkdir and mv commands. However I would prefer to do that as a follow on PR.

[AlanCoding]

might be good to add "_readthedocs" to the .gitignore file

Also, linter wants

./.readthedocs.yaml
  4:1       warning  missing document start "---"  (document-start)

because it's a yaml file, it's checked by yamllint. If that might cause trouble there is an ignore list somewhere.

[AlanCoding]

I edited the ISSUE TYPE because our checks look for highly specific syntax with that.