Create library reference overview

[Dickson-Mwendia]

No description provided.

[learn-build-service-prod]

Learn Build status updates of commit c30a310:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
python/docs-ref-autogen/msal/overview.md	⚠️Warning	View (msal-py-latest)	Details
python/docs-ref-autogen/toc.yml	⚠️Warning	View (msal-py-latest)	Details
python/docs-ref-autogen/msal/index.yml	✅Succeeded	View (msal-py-latest)

python/docs-ref-autogen/msal/overview.md

• Line 9, Column 13: [Warning: ms-service-subservice-invalid - See documentation] Invalid value for 'ms.service': 'activedirectory'.
• Line 17, Column 77: [Suggestion: preserve-view-not-set - See documentation] You've pinned this link to a specific version of content with the view parameter. It's recommended not to pin a version unless that version is A) not the default view and B) the context is about that version specifically. To proceed with pinning a version add the &preserve-view=true to the URL. Otherwise, remove the view parameter. URL: /python/api/msal/msal?view=azure-python
• Line 92, Column 3: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://docs.microsoft.com/azure/active-directory/develop/msal-error-handling-python' will be broken in isolated environments. Replace with a relative link.
• Line 93, Column 3: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://docs.microsoft.com/azure/active-directory/develop/msal-logging-python' will be broken in isolated environments. Replace with a relative link.

python/docs-ref-autogen/toc.yml

• Line 3, Column 11: [Warning: file-not-found - See documentation] Invalid file link: 'overview.md'.

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[Saisang]

I've updated config to main branch. You could close this PR. @Dickson-Mwendia

[Dickson-Mwendia]

Thank you so much @Saisang