migrate application to signals

> Author: Thomas Laforge ### Information ### Statement ### Step 1 ### Step 2 ### Constraints: ### Submitting your work 1. Fork the project 2. clone it 3. npm ci 4. `npx nx serve rxjs-to-signal` 5. _...work on it_ 6. Commit your work 7. Submit a PR with a title beginning with **Answer:30** that I will review and other dev can review. rxjs-to-signal rxjs-to-signal solution author _You can ask any question on_ twitter