docs: add entra connect guide

[nibalizer]

Pull Request Description

Adds docs on setting up an Entra tenant and adding it.

What and why?

How to test

What needs special review?

Dependencies, breaking changes, and deployment notes

Release notes

Checklist

• What and why
• Screenshots or videos (Frontend)
• How to test
• What needs special review
• Dependencies, breaking changes, and deployment notes
• Labels applied
• PR linked to Shortcut
• Unit tests added (Backend)
• Tested locally
• Documentation updated (if required)
• Environment variable additions/changes documented (if required)

[github-actions]

Pull requests must include at least one of the required labels: internal (no release notes required), highlight, enhancement, bug, deprecation, documentation. Except for internal, pull requests must also include a description in the release notes section.

[github-actions]

PR Summary

This PR updates the documentation to provide detailed guidance on configuring Single Sign-On (SSO) integration with Microsoft Entra ID (formerly Azure AD). The key changes include:

• An additional note in the FAQ documentation highlighting the support for SSO integration, now referencing a new footnote which links to the SSO setup guide.
• Updates to the guide sidebar to include the new 'Configure SSO with Microsoft Entra ID' page, ensuring easier discovery of the SSO configuration instructions.
• The introduction of a new document that provides a comprehensive, step-by-step guide. This guide covers prerequisites, registration of an application in Entra ID, configuration of token claims, mapping of Entra groups to product roles, and testing the sign-in process.

These enhancements are aimed at helping customers properly integrate their Microsoft Entra ID with our product, ensuring a seamless and secure SSO experience without the need for a client secret.

Test Suggestions

• Manually follow the new SSO guide instructions to configure integration with Microsoft Entra ID and verify that each step is clear and functional.
• Check that the sidebar link navigates correctly to the new SSO guide page.
• Verify that all cross-references and footnotes, such as [^12], properly link to the intended documentation sections.
• Ensure consistency in formatting and style across the updated pages.

[github-actions]

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Lighthouse check results

✓ INFO: Average accessibility score is 0.92 (required: ≥0.9) — View the workflow run

Audit mode: changed pages (3 URL(s))

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Commit SHA: 8c95039

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Page	Accessibility	Performance	Best Practices	SEO
/faq/faq-organizations.html	0.91	0.42	1.00	0.82
/faq/faq-organizations.html	0.91	0.73	1.00	0.82
/guide/configuration/configure-sso-with-entra.html	0.93	0.71	1.00	0.82
/guide/configuration/configure-sso-with-entra.html	0.93	0.76	1.00	0.82
/guide/configuration/managing-users.html	0.91	0.66	1.00	0.82
/guide/configuration/managing-users.html	0.91	0.76	1.00	0.82
/faq/faq-organizations.html	0.91	0.70	1.00	0.82
/guide/configuration/configure-sso-with-entra.html	0.93	0.73	1.00	0.82
/guide/configuration/managing-users.html	0.91	0.70	1.00	0.82