Update Team Management docs for the unified team page

[geethuannjoseph]

What does this PR do? What is the motivation?

Fixes OMG-1584

Updates the Team Management documentation for the unified team page. Rewrites the team detail section around the three tabs (Info, Resources, and On-Call), documents each tab's sections and the Include Subteams toggle, updates the editing and settings instructions, and removes the obsolete Page Layout section.

Merge instructions

Merge readiness:

• Ready for merge

Additional notes

[github-actions]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/geethu.joseph/team-details-page/account_management/teams/manage

[buraizu]

Thanks for the PR, I've created DOCS-15062 for documentation team review

[tomnof]

Overall: solid and accurate, but I'd pull it up a level.

The three-tab structure is the right backbone and the rewrite is a real improvement. My one piece of feedback is that it's drifted toward enumerating the UI rather than explaining it — most sections list every item in the tab (every resource type, every On-Call sub-section, etc.).

I've left inline suggestions to compress each tab to a one-sentence overview of what a user will find there, keeping the genuinely page-specific behavior (the Include Subteams toggle, the header edit affordances, the Managed badge). The goal is to describe the page at a level that stays true as the product evolves, and link out for the details.

sorry didn't mean to approve! dismissing review