Override the entry point per procedure

Procedures can now declare which file or directory the station hands to the framework runner. Useful when your repo doesn't follow the default layout, or when you want pytest to scan a specific subdirectory.

• Added an Entry point field to the Build configuration section on every procedure page
• Forwarded the value through the deployment manifest so the station picks it up on the next pull
• Defaulted to the framework convention when left blank: main.py for OpenHTF and plain Python, the package directory for pytest, procedure.yaml for the TofuPilot Framework