Implement pac-man.py config.json entrypoint. Exactly one argument required. Clean, human-readable error messages.
Acceptance criteria: missing/invalid file produces a readable error, never a traceback.
Week: Week 1
Milestone: Week 1 - Foundations
Estimate: S
Depends on: CFG-02
Implement pac-man.py config.json entrypoint. Exactly one argument required. Clean, human-readable error messages.
Acceptance criteria: missing/invalid file produces a readable error, never a traceback.
Week: Week 1
Milestone: Week 1 - Foundations
Estimate: S
Depends on: CFG-02