Enhance Space Command Protocol Module with detailed requirements and documentation

- Added comprehensive documentation for the SpaceCommand enum, detailing priority classifications and requirements fulfilled.
- Expanded command descriptions to include specific requirements for emergency, critical, high, medium, and low priority commands.
- Improved method documentation for priority determination, preferred communication band selection, execution time constraints, confirmation requirements, and command descriptions.
- Introduced a CommandBuilder struct with validation and safety checks for command construction, ensuring compliance with CCSDS standards.
- Enhanced logging and audit trail capabilities by providing unique discriminant values for each command type.

Author: Kevin