graxpert gpu torch

Kubuntu 26.04 running siril. 
remove whatever is at:

~/.local/share/siril

open a terminal there. Then it's simply:

pip3.12 -m venv venv
. venv/bin/activate

Siril was complaining about not being able to load some CUDA 13 stuff, so from here:
 https://pytorch.org/get-started/locally/

choose your poison

Then it's simply:

pip3 install torch torchvision

Launch siril now, and we get hw accellerateion: 

02:06:46: Testing CUDAExecutionProvider...

02:06:46: OK: CUDAExecutionProvider ran successfully

02:06:46: Testing CPUExecutionProvider...

02:06:46: OK: CPUExecutionProvider ran successfully

02:06:46: === Summary ===

02:06:46: OK: Working providers (in priority order):

02:06:46:   - CUDAExecutionProvider

02:06:46:   - CPUExecutionProvider

02:06:46: → Best available provider: CUDAExecutionProvider

02:06:46: Cached execution providers to /home/steve/.config/siril/siril_onnx.conf

02:06:48: Using inference providers: ['CUDAExecutionProvider', 'CPUExecutionProvider']

02:07:03: Finished denoising