Add Vietnamese (Viterbox) community finetune support
Implementation details:
- Add Vietnamese (Viterbox) as model_version option for ChatterBox Official 23-Lang
- Support dolly-vn/viterbox repository with expanded Vietnamese tokenization (2549 tokens)
- Add flexible T3 model filename detection for community finetunes
- Add version normalization for file lookups and tokenizer selection
- Add Vietnamese language code mapping in language_mapper.py
- Fix vocab size detection by loading tokenizer before T3 model initialization
- Support 'as-is' format handling for mixed .pt/.safetensors community models
diodiogod
a8e2de16e7