Add GH workflow

[hack3rvaillant]

Add CI Pipeline & Simplify Key Rotation

Changes

🔄 Added GitHub Actions Workflow

• Set up continuous integration pipeline running on:
  • Push to main branch
  • Pull requests targeting main
• Pipeline steps:
  1. Checkout code
  2. Configure Ruby environment with bundler cache
  3. Execute key rotation script
  4. Run RSpec test suite

🔑 Simplified Key Rotation Script

• Removed redundant environment variable cleanup
• Keys are now appended to .env file without prior deletion
• Maintains same RSA key generation functionality

Why

• Automated testing ensures code quality and prevents regressions
• Simplified key rotation reduces potential file manipulation issues
• CI integration helps catch issues early in the development cycle

Testing Done

The changes have been verified by:

• Running the modified key rotation script locally
• Confirming GitHub Actions workflow executes successfully
• Validating RSpec test execution in CI environment

Notes

• No changes to core application logic
• CI pipeline uses Ubuntu latest for consistent build environment
• Key rotation still generates both public and private RSA keys

[paulRbr]

Very nice, thanks for the automated tests that will help contributions on this project!