v0.0.4

What's New

• Vocab access APIs: id_to_token(), token_to_id(), get_vocab(), decode_batch() — in both Rust and Python
• Padding & truncation: enable_padding(), enable_truncation(), no_padding(), no_truncation() — HuggingFace-compatible API
• Encode returns Encoding: encode() and encode_batch() now return Encoding objects with ids, attention_mask, and type_ids
• Batch pair encoding: encode_pair_batch() for parallel cross-encoder inference
• 60 pre-built tokenizers: Published to tokiers HuggingFace org
• Performance: Cached num_cpus(), zero-copy id_to_token() via Cow<str>
• Cleanup: Removed 27 redundant examples, 10 unused dev-dependencies, -4500 lines net