Fix WATonomous Entrypoint and WATonomous Install Dir

[Edwardius]

📑 Description

There was an issue with the entrypoint's location, it was being copied into the AMENT_WS, but later deleted. It should be put in the WATONOMOUS_INSTALL directory.

✅ Checklist

• My code builds and runs locally without warnings
• I added/updated tests if needed
• I updated documentation / comments
• I listed any breaking changes in the “Notes” section

[lucasreljic]

Works now 👍