Add dataset_infos.json with explicit Value(string) for all fields

Add dataset loading script to fix 'Feature type Json' error

Simplify dataset metadata for Hub viewer compatibility

Add dataset_infos.json with explicit string features

Restructure: move JSONL to root, fix README metadata

Revert "Add coding-excellence dataset (chat format, 100k records)"

Revert "Update README with coding-excellence dataset documentation"

Update README with coding-excellence dataset documentation

Add coding-excellence dataset (chat format, 100k records)

Fix task_categories warning - remove invalid 'conversational'

v-Fable: scaled to 100,000 records with corrected YAML metadata

v-Fable: synthetic Fable-5 traces dataset generated from Glint-Research/Fable-5-traces distribution

initial commit