Adding new model architectures

[michael-fuest]

CENTS currently only supports vanilla GANs, ACGAN and Diffusion-TS model backbones. CENTS should be extended to also support a broader range of architectures.

You can find a good overview here: https://github.com/yyysjz1997/Awesome-TimeSeries-SpatioTemporal-Diffusion-Model?tab=readme-ov-file#generation

I would start by adding some of the newer, state of the art backbones such as:

• [Time Weaver] ( https://arxiv.org/html/2403.02682v1) -> starting with this, because the problem statement is similar
• Wave Stitch
• TS Diffusion
• DS Diffusion