This PR improves the model card by:
- Adding `pipeline_tag: time-series-forecasting` so the model is discoverable under time-series forecasting.
- Adding `license: mit` based on the project's MIT license.
- Adding a link to the paper [HamiFormer: Dual-Expert Diffusion Fields with Affine Symplectic Maps](https://huggingface.co/papers/2609.32838).
- Aligning the GitHub link with the project repository and adding the project page.
