Add GPU selection

[ZeusAFK]

This update improves the initialization process by:

• Detecting and listing all available GPUs on the system.
• Prompting the user to select a preferred GPU before any model loading begins.

[tugalsan]

I have LG14, and framepack uses integrated GPU in Turbo Mode :...(

[oskapt]

you can set the env var CUDA_VISIBLE_DEVICES to the GPU you want framepack to use, and that's the one that it will see:

$ export CUDA_VISIBLE_DEVICES=1  # for GPU #1
$ python3 ./demo_gradio_f1.py

or all-in-one: CUDA_VISIBLE_DEVICES=1 python3 ./demo_gradio_f1.py

[ZeusAFK]

you can set the env var CUDA_VISIBLE_DEVICES to the GPU you want framepack to use, and that's the one that it will see:

$ export CUDA_VISIBLE_DEVICES=1  # for GPU #1
$ python3 ./demo_gradio_f1.py

or all-in-one: CUDA_VISIBLE_DEVICES=1 python3 ./demo_gradio_f1.py

No way, really? awesome, thanks!