chore: add GitHub templates and community files
- Add Issue templates (bug report, feature request) with bilingual support
- Add PR template with bilingual support
- Add Dependabot configuration for Python, Docker, and GitHub Actions
- Add labels configuration with 30+ standardized labels
- Add code quality workflow (Black, isort, Flake8, Bandit)
- Add LICENSE (Apache 2.0)
- Add CONTRIBUTING.md with development guidelines
- Add SECURITY.md with vulnerability reporting process
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
