[cherry-pick] Move internal docs folder outside of website docs folder

[github-actions]

Proposed changes

This commit moves an erroneously placed folder from the website docs folder into a new docs folder at the root of the repository.

It is internal documentation, matching the structure of NGINX Gateway Fabric's folders, used for similar purposes.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

need to fix linting

[ADubhlaoich]

@vepatel I can address the linting in my follow-up PR for removing docs artifacts and configuration.

[vepatel]

@ADubhlaoich have already added #7908 to main branch as it was failing other pipelines so can be manually cherry-picked

[github-actions]

✅ Deploy Preview will be available once build job completes!

Name	Link
😎 Deploy Preview	https://frontdoor-test-docs.nginx.com/previews/nginx-ingress-controller/7907/

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-5.0@892ff15). Learn more about missing BASE report.

Additional details and impacted files

@@              Coverage Diff               @@
##             release-5.0    #7907   +/-   ##
==============================================
  Coverage               ?   52.20%           
==============================================
  Files                  ?       89           
  Lines                  ?    21275           
  Branches               ?        0           
==============================================
  Hits                   ?    11106           
  Misses                 ?     9705           
  Partials               ?      464           

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