cleanup: Remove unnecessary files

Removed:

• test_file.js (test file)
• vulnerable_code.js (test file with vulnerabilities)
• project.env (local environment file with secrets)
• examples/ directory (example files)
• env.example (example environment file)

Kept only essential files for code review automation:

• .gitlab-ci.yml (CI/CD pipeline)
• scripts/ (analysis scripts)
• config/ (configuration files)
• README.md (documentation)
• QUICK_START.md (quick start guide)
• .gitignore (git ignore rules)