Support for Downloading and Loading Different Diffusion Models

[threeal]

This issue aims to add a new feature to the minimal animate diff inference, enabling users to effortlessly download and load various diffusion models. By offering automatic model downloads and dynamic loading, users can easily choose different styles and animation effects, significantly expanding creative possibilities. With this enhancement, the minimal animate diff tool will become more versatile and user-friendly, empowering users to create diverse and visually appealing animations.