docs: migrate to astro with starlight

[mervyn-mccreight]

Move to a project that is more possible to
be actively maintained in the future.

[coderabbitai]

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Review skipped

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Run ID: 0fa54a98-0f91-4dd9-847d-1e207d3922c7

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/migrate

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.28%. Comparing base (67009c4) to head (6634d1f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #635   +/-   ##
=======================================
  Coverage   84.28%   84.28%           
=======================================
  Files         152      152           
  Lines        5000     5000           
  Branches      859      859           
=======================================
  Hits         4214     4214           
  Misses        489      489           
  Partials      297      297           

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