Pyomic Change

[Starlitnightly]

• [x] Add drug response analysis from scDrug
• [x] Support bulk and single cell data integration, like BayesPrism
• [x] Support the single cell different expreesion gene analysis (scDEG)
• [x] Add the GSEA analysis in single cell omics
• [x] Update the readthedocs by mkdocs