Native spicemix

[peicai]

• Specify the preprocess parameter in the configs to ensure preprocessing is performed within the script.
• It seems the pipeline doesn't use PCA, despite finding the _pca function; I didn't add it.
• I encountered an error while attempting to run on CPU due to lack of GPU access:

Traceback (most recent call last):
  File "/home/jovyan/scratch/SpaceHack2/userfolders/pcai/SpaceHack2023/native_implementation/SpaceHack2023/method/SpiceMix/SpiceMix.py", line 187, in <module>
    model = SpiceMix(
  File "/home/jovyan/conda_envs/test_SpiceMix/lib/python3.8/site-packages/popari/model.py", line 459, in __init__
    super().__init__(spatial_affinity_mode="shared lookup", **spicemix_hyperparameters)
TypeError: __init__() got an unexpected keyword argument 'device'

with torch_context = `{'device': 'cpu', 'dtype': torch.float64}, which might be related to issues: #225 and #231. I'll leave it as is for now and will test it on the cluster.