[Model Request] Nemotron-3-nano-4b

## ⚙️ Request New Models - Link to an existing implementation (e.g. Hugging Face/Github): https://huggingface.co/blog/nvidia/nemotron-3-nano-4b - Is this model architecture supported by MLC-LLM? (the list of [supported models](https://llm.mlc.ai/docs/prebuilt_models.html)) Yes ## Additional context > Nemotron 3 Nano 4B: A Compact Hybrid Model for Efficient Local AI <img width="1622" height="589" alt="Image" src="https://github.com/user-attachments/assets/cef9f05d-cadb-46c2-8fde-824cb08100dd" /> It hallucinates far less than Qwen3/3.5 in thinking mode. Thank you for maintaining this amazing project!