docs: add linked FastH3 acknowledgements

[docs] fix FastH3 installation instructions

[docs] simplify FastH3 model card

[docs] add FastVideo logo to model card

[docs]: document the FastH3 VSA kernel requirement

Copy files from models/FastVideo/FastH3-Dense-4-step-v1-LoRA

Copy files from models/FastVideo/FastH3-4-step-v1.2-LoRA

Copy files from models/FastVideo/FastH3-4-step-v1.1-LoRA

Copy files from models/FastVideo/FastH3-4-step-v1-LoRA

[release]: initialize FastH3 Preview v1 LoRA bundle

initial commit