Fix: Improve useTorchLight hook and add tests

[JonatanSalas]

This commit addresses issues with the useTorchLight hook to improve its reliability across different browsers and adds comprehensive testing.

Key changes include:

• Refactored turnOn function:
  • Prioritizes track.getCapabilities() for torch detection.
  • Uses ImageCapture API as a secondary method.
  • Includes a fallback to direct applyConstraints.
• Refactored turnOff function:
  • Consolidated logic to use track.applyConstraints({ advanced: [{ torch: false }] }).
  • Removed outdated stream.applyConstraints and unrelated RTCPeerConnection logic.
• Improved Error Handling and Logging:
  • Added comprehensive try-catch blocks.
  • Ensured consistent onError callback usage.
  • Implemented descriptive debug logging.
• Enhanced Type Checking and Safeguards:
  • Added instance checks for MediaStream and MediaStreamTrack.
  • Implemented checks for method existence (e.g., getCapabilities, applyConstraints, ImageCapture) before calls.
  • Added checks for capabilities objects.
• Added Unit Tests:
  • Created useTorchLight.test.ts with extensive tests using @testing-library/react-hooks.
  • Mocked browser APIs (MediaStream, MediaStreamTrack, ImageCapture, navigator.vibrate).
  • Covered successful on/off cycles, various error scenarios, callback invocations, and debug logging.
  • Installed necessary devDependencies (@testing-library/react-hooks, react, react-dom).
• Set up GitHub Actions:
  • Created a ci.yml workflow to run tests automatically on push to main and pull requests.
  • Added a "test": "jest" script to package.json.