document available case datasets in the package #61
Description
This issue tracks and documents all built-in case datasets included in the package for reproducibility and user reference.
Currently includes:
- Greater Perth traffic crash dataset (PR add Greater Perth traffic crash dataset as a case study #60)
- Loess Plateau precipitation–soil moisture–NDVI dataset (PR include case datasets #41)
This issue serves as a central place to maintain dataset descriptions, metadata, and usage examples.