✨ feat(cli): migrate build_season_schedule and compute_ratings to typer CLI

- add typer-based CLI to build_season_schedule.py for structured option handling
- refactor compute_ratings.py to remove argparse and support typer CLI
- improve typing and option descriptions in compute_ratings.py main function
- add .gitignore entry for __pycache__
- add requirements.txt with dependencies for the project

.gitignore

@@ -1,2 +1,3 @@
 /*.csv
-/*.numbers
+/*.numbers
+**/__pycache__