fix: renaming config top4 to top4-balanced

fix: removing train/test split (leaving this responsiblity to the data loader)

fix: removed weird descpritions

fix: removing empty lines

fix: removing entries with empty text

Merge branch 'main' of hf.co:datasets/contemmcm/ag_news

fix: adjusting configs

feat: config top4

Librarian Bot: Add language metadata for dataset (#2)

fix: metadata features defintion

Create README.md

feat: first commit

initial commit