Reorganize workflow docs nav and update landing page

[Copilot]

This PR reorganizes workflow documentation around what users want to do first, and updates the landing page to prioritize quick setup.

What changed

Workflows nav (mkdocs.yml)

• Replaced trigger-based grouping with intent-based sections:
  • Core Workflows: Issue Triage, Mention in Issue, Mention in PR, PR Review
  • Repository Maintenance: duplicate/stale issue handling, PR body updates, issue/PR action maintenance, dependency review, fork review
  • Codebase Maintenance: detector/fixer chaining plus scheduled quality workflows
  • Planning & Insights: planning and analysis workflows
• Kept Base Workflows and Elastic-specific sections.
• Moved no-sandbox variants into a dedicated Advanced section.

Landing page (docs/index.md)

• Replaced the blog-first entry flow with Get Started in 60 Seconds at the top.
• Added a pre-filled Copilot PAT creation link.
• Added a setup snippet that sets COPILOT_GITHUB_TOKEN and runs quick-setup.sh.
• Highlighted the core four workflows in a trigger/description table.
• Added highlight tables for repository maintenance and codebase maintenance workflows.
• Moved "Meet the Crew" below setup and workflow guidance.
• Removed the older lower-page quick-start/catalog sections that duplicated onboarding information.

Motivation

• Fixes Reorganize workflow docs #593

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 112528bc-d2c6-4869-8bd2-d07b3610d001

📥 Commits

Reviewing files that changed from the base of the PR and between b2ec879 and 2fd8256.

📒 Files selected for processing (2)

• docs/index.md
• mkdocs.yml

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📝 Walkthrough

Walkthrough

The pull request reorganizes workflow documentation by restructuring the landing page from narrative content to task-focused sections (Get Started, Core Workflows, Repository Maintenance, Codebase Maintenance) and restructuring the navigation file to introduce new workflow categories. Core Workflows now groups issue triage, mention workflows, and PR review. Repository Maintenance and Codebase Maintenance sections are newly added, with multiple workflow entries reparented and consolidated under these categories.

Possibly related PRs

• docs: surface quick setup script in the Quick Start section #433: Modifies docs/index.md onboarding content to surface quick-setup script and restructure initial guidance
• docs: focus docs on gh-aw workflows; move Claude to legacy #280: Reorganizes docs/index.md and mkdocs.yml navigation to promote certain workflows and restructure top-level documentation hierarchy
• docs: revamp docs as Elastic Agent Factory #365: Performs overlapping navigation reorganization and workflow renaming across the same documentation files

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	PR successfully implements all four core objectives from issue #593: promotes four core workflows in nav, groups repository-maintenance workflows, groups codebase-maintenance workflows, and updates landing page with quick-start focus.
Out of Scope Changes check	✅ Passed	All changes are directly aligned with issue #593 objectives. mkdocs.yml and docs/index.md modifications exclusively reorganize navigation and landing page as specified.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch copilot/reorganize-workflow-docs

• 🛠️ Update Documentation: Commit on current branch
• 🛠️ Update Documentation: Create PR

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