docs(contribute): fix the stale repo tree in CONTRIBUTE.md

[coderdan]

The repo-layout tree in CONTRIBUTE.md predated several package removals and the #842 rename: it listed packages/protect/ (removed), schema and drizzle (removed legacy dirs), and prisma-next (now stack-prisma after #844). Now lists the real adapter dirs. Docs-only; no changeset (internal contributor doc, not shipped).

Summary by CodeRabbit

• Documentation
  • Updated the repository structure guide to reflect the current package organization.
  • Clarified that the packages directory contains stack integrations and related tooling.

[changeset-bot]

⚠️ No Changeset found

Latest commit: c80e4f6

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 754bcdbc-ef14-4b58-9ed8-a207c0b7ce94

📥 Commits

Reviewing files that changed from the base of the PR and between d2772b0 and c80e4f6.

📒 Files selected for processing (1)

• CONTRIBUTE.md

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📝 Walkthrough

Walkthrough

Updated the repository structure tree in CONTRIBUTE.md to replace the packages/protect/ entry with references to stack and framework integrations.

Changes

Repository structure documentation

Layer / File(s)	Summary
Repository structure tree CONTRIBUTE.md	The packages/ tree now references stack-drizzle, stack-supabase, stack-prisma, nextjs, migrate, and wizard integrations instead of protect/.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• cipherstash/stack#552: Updates CONTRIBUTE.md with broader repository layout and Protect.js-to-Stack naming changes.

Suggested reviewers: calvinbrewer

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the documentation-only repo tree update in CONTRIBUTE.md.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/contribute-tree-fix

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[coderdan]

Minor documentation fix. No code changes.