Add ood_train split to README YAML config declarations

Add ood_train split to README YAML config declarations

new configs

Update README for 40 configs, id_test split, and elevation shift

Regenerate configs with full OOD and few-shot variants

Regenerate configs: ID/OOD only, 90:10 train/val, region shift, fixed paired test sets

pdate configs: remove density splits, add region shift, 90:10 train/val, shared test sets

Declare custom splits via README YAML (density-aware OOD splits)

Add density-aware OOD splits and regenerate configs

Update README.md

updated readme

Replace configs with named international/nation/biome suites

Add dataset configs and COCO export tool