Clone fork

[6Morpheus6]

Tencent removed SongGeneration from github which breaks all existing Songgeneration installer.
This PR clones a Fork of the original Project I created.
It also downloads new_prompt.pt from huggingface since it vanished together with the github project.

Modifications:

• clone fork https://github.com/6Morpheus6/songgeneration-tencent
• use custom requirements instead of copying them
• install models as last step
• download new_prompt.pt and songgeneration models from my huggingface repos
• use classic mode to keep Babel from injecting import commands causing the frontend to fail starting with the error: "Cannot use import statement outside a module"
• exclude linux nvidia from bluefairy protection (bluefairy fix)