Update dataset card with additional metadata

Add ts2019 (8,265,318 rows)

Add hoarding2022 (62 rows)

Update configs with all uploaded datasets

Fix configs: only include uploaded datasets, set valid default

Fix YAML indentation for dataset viewer

Add default config for dataset viewer

Add PGC OCD & Tourette Syndrome GWAS summary statistics (parquet, 10k-row shards)

initial commit