<commit_before><commit_msg>docs: add npm plugin README.md<commit_after># npm plugin

TODO: description.

## Configuration

- **taito_npm_use_yarn**: Use yarn instead of npm. Value: `true` of `false`. Default: `false`.
{'fraction_non_alphanumeric': 0.1382488479262673, 'fraction_numerical': 0.0, 'mean_word_length': 5.606060606060606, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '1419959', 'n_tokens_mistral': 78, 'n_tokens_neox': 71, 'n_words': 22}