Add user impersonation documentation (experimental)

[mintlify]

Summary

• Added new documentation page for user impersonation feature (PR #20075)
• Feature is marked as experimental, requiring customers to request access
• Documented in Admin section under "User impersonation"

Changes

• Created references/workspace/user-impersonation.mdx with:
  • Experimental warning banner (matching pattern from Map and Spotlight beta features)
  • Feature overview and how it works
  • Who can use it (org admins only)
  • Step-by-step instructions for starting/stopping impersonation
  • Common use cases
• Updated docs.json to add page to Admin navigation group

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Status

⚠️ 2 broken links need manual attention

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🔗 Broken Links (Manual Fix Required)

Click to view details

   📄 references/workspace/user-impersonation.mdx:33 → /images/references/workspace/user-impersonation/impersonate-menu.png
   📄 references/workspace/user-impersonation.mdx:37 → /images/references/workspace/user-impersonation/impersonation-banner.png

[github-actions]

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[github-actions]

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