Preprocess
Apply preprocessing on raw data for more effective analysis and detecting biological signal.

Methods:
- annotate hb
- annotate mito
- annotate ribo
- batch effect removal
- cell cycle scoring
- downsample data
- filter cells
- filter genes
- filter highest expr genes
- filter highly variable genes
- measure gene counts
- normalize counts
- pca
- recipes
- regress out
- remove genes
- run doubletdetection
- run scrublet
- scale to unit variance
- subsample data