Add sitemap to docs

[OriolAbril]

Description

Should help search engines get better results of pages within the docs.

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

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📚 Documentation preview 📚: https://pymc--7171.org.readthedocs.build/en/7171/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.29%. Comparing base (74748c7) to head (867bef2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7171   +/-   ##
=======================================
  Coverage   92.29%   92.29%           
=======================================
  Files         101      101           
  Lines       16947    16947           
=======================================
  Hits        15642    15642           
  Misses       1305     1305           

[twiecki]

[OriolAbril]

It won't be in /stable/ until the next release, should be on latest only for now

[twiecki]

[OriolAbril]

Is there a typo in the robots file? I see a sitemap at https://www.pymc.io/projects/docs/en/latest/sitemap.xml

[twiecki]

Now it worked.