Update dataset card with paper link, GitHub link, and evaluation usage

Add remaining CPT corpus shards

Use three-digit CPT shard filenames

Add CPT corpus shards part17 to part24

Add CPT corpus shards with unified filenames

Add station ID list file

Update README release and evaluation protocol

Update README with dataset release details

Update TransitLM CSV exports

Create README.md

Upload route_flow_test_dataset_all.csv

initial commit