croissant: dual rai: prefixed + unprefixed RAI keys for validator compatibility

croissant.json: unprefix RAI fields, add @context aliases (NeurIPS RAI compatibility) (#7)

croissant.json: split aggregated recordSets to one per fileset (source cardinality fix) (#6)

Update Croissant 1.1 metadata: fix forbidden chars, paths, recordSet IDs (#5)

Add Croissant 1.1 metadata (croissant.json) (#3)

Restructure data/: drop Spatial, rename to dense_captioning / event_verification / pointing / referring / temporal_localization / vqa (#4)

Upload full release dataset under data/ (#2)

Move task overview figure from Dataset Description to References

Fix Section 2 nesting in LICENSE.md

Add markdown LICENSE and point license_link to LICENSE.md

Update dataset card with task overview figure and HF link

Update review comments

Update README.md

initial commit