Doc: Readme updates to align with new Red Hat template

JulioPDX commented 4 months ago

Change Summary

README at the root of the collection has been updated to conform with the new Red Hat collection template. Due to not being able to link to files outside of the Mkdocs docs_dir location, the old README at the root of the collection has been renamed to index.md. This is used as the homepage on the documentation site. The root README for the repository is only used for GitHub.

Proposed changes

Please see the change summary.

How to test

No updates to main site docs.

Checklist

User Checklist

N/A

Repository Checklist

[x] My code has been rebased from devel before I start
[x] I have read the CONTRIBUTING document.
[x] My change requires a change to the documentation and documentation have been updated accordingly. (check the box if not applicable)
[x] I have updated molecule CI testing accordingly. (check the box if not applicable)