docs: update release notes and add AGENTS.md for project guidelines

[shenxianpeng]

Summary by CodeRabbit

• Documentation

  • Updated release notes generation wording.
  • Added contributor workflow guidance documentation.

• Chores

  • Removed internal AI coding guide documentation.

No user-facing changes in this release.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: b55baf97-aa4b-46cb-b48e-818fb78fcedc

📥 Commits

Reviewing files that changed from the base of the PR and between 2d1b963 and 6124424.

📒 Files selected for processing (3)

• .github/copilot-instructions.md
• .github/workflows/release-drafter.yml
• AGENTS.md

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Walkthrough

Removes .github/copilot-instructions.md (109 lines), adds AGENTS.md with Git workflow rules, project overview, hook behavior patterns, and CI summary. Updates the release-drafter workflow to reword the default clang tool versions header describing dynamic PyPI resolution and --version pinning.

Changes

Documentation and Release-Drafter Update

Layer / File(s)	Summary
Add AGENTS.md contributor guide AGENTS.md	Adds 53-line contributor guide covering mandatory Git/PR rules (no direct main commits, no force-push), a project overview table mapping key files to roles, core hook behavioral patterns (PyPI-based version resolution, return codes, compile DB detection, --jobs parallelism), and a CI configuration summary. Replaces the removed .github/copilot-instructions.md.
Update release-drafter version note wording .github/workflows/release-drafter.yml	Rewrites the three-line block emitted for the "Default Clang Tool Versions" section, stating versions are resolved dynamically from PyPI at hook runtime, latest stable versions are used by default, and pinning is done via --version under args.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• cpp-linter/cpp-linter-hooks#120: Edits .github/workflows/release-drafter.yml configuration and template placeholders, directly overlapping with this PR's release-drafter header wording change.
• cpp-linter/cpp-linter-hooks#172: Added the .github/copilot-instructions.md file that this PR removes entirely.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.51%. Comparing base (2d1b963) to head (6124424).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #245   +/-   ##
=======================================
  Coverage   97.51%   97.51%           
=======================================
  Files           3        3           
  Lines         241      241           
=======================================
  Hits          235      235           
  Misses          6        6           

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