feat(ci): add automated testing and release workflows

[JasonXuDeveloper]

Description

This PR implements comprehensive CI/CD automation for JEngine, enabling automated testing on PRs and one-click releases with automatic changelog generation.

Type of Change

• ✨ New feature (adds functionality)
• 🔧 Build/config changes

Package Scope

• JEngine.Core (com.jasonxudeveloper.jengine.core)
• JEngine.Util (com.jasonxudeveloper.jengine.util)
• Other (specify): CI/CD infrastructure

What's Included

1. Automated PR Testing

• unity-tests.yml: Reusable workflow for running Unity EditMode and PlayMode tests
• pr-tests.yml: Automatically runs tests on every PR and comments results
• Unity Library caching for 50%+ speedup on subsequent runs
• PR check status integration

2. Release Automation

• release.yml: One-click release workflow with version bumping
• Automatic changelog generation from conventional commits
• Support for dual-package versioning (Core + Util)
• GitHub App authentication for secure bot commits
• Automatic updates to package.json, README, and CHANGE.md files
• GitHub release creation with OpenUPM integration

3. Developer Guidelines

• CLAUDE.md: Added conventional commits specification
• PULL_REQUEST_TEMPLATE.md: PR template to guide contributors

Benefits

✅ Automated Testing: Every PR runs Unity tests automatically
✅ Quality Control: Tests must pass before merge
✅ Easy Releases: One-click releases with automatic version bumping
✅ Auto Changelog: Generated from conventional commits
✅ OpenUPM Integration: Automatic package publishing
✅ Consistent Commits: Guidelines for contributors

Testing

This PR itself will test the PR workflow:

• PR tests should trigger automatically
• Test results should be commented on this PR
• PR check status should update

After merge, the release workflow can be tested manually via Actions tab.

Test environment:

• Unity version: 2022.3.55f1
• Platform(s): ubuntu-latest (GitHub Actions)
• Test mode: [x] EditMode [x] PlayMode

Additional Notes

Prerequisites (already completed):

• ✅ GitHub App (JEngine Release Bot) created with required permissions
• ✅ Secrets configured: UNITY_EMAIL, UNITY_PASSWORD, UNITY_SERIAL, RELEASE_APP_ID, RELEASE_APP_PRIVATE_KEY
• ✅ Branch protection bypass configured for Release Bot

First run timing:

• PR tests: ~7-12 minutes (first run with cache build)
• Subsequent runs: ~3-5 minutes (with cache)
• Release workflow: ~15-20 minutes

Post-merge tasks:

• Test release workflow manually from Actions tab
• Monitor first release to verify OpenUPM integration
• Update project documentation with CI/CD info

---

🤖 This PR was prepared with assistance from Claude Code

[github-actions]

Unity Test Results

✅ EditMode: All tests passed
✅ PlayMode: All tests passed

Unity Version: 2022.3.55f1
Project Path: UnityProject

✅ All tests passed! The PR is ready for review.

View workflow run

Click here to view the full workflow run

[claude]

Code review

I found one issue that should be addressed:

Missing XML Documentation

File: BuildManager.cs:87

The public constructor is missing required XML documentation.

According to CLAUDE.md, all public APIs must be documented with XML comments including <summary> and <param> tags.

Suggested fix:

/// <summary>
/// Initializes a new instance of the BuildManager class.
/// </summary>
/// <param name="settings">The build settings to use.</param>
/// <param name="logCallback">Callback for logging build messages.</param>
public BuildManager(Settings settings, Action<string, bool> logCallback)
{
    _settings = settings;
    _logCallback = logCallback;
}

[JasonXuDeveloper]

Closing this PR - branch was based from wrong branch. Will reopen with correct base from master.