Custom user dataset input

[hsmaan]

• Currently there is still no infastructure in place for users to utilize their own datasets in the perturbation experiments and the Iniquitate pipeline
• First step would be to begin by adding processing script for users h5ad inputs to get it set up and ready for the perturbation experiments

[hsmaan]

PR for this here: https://github.com/hsmaan/Iniquitate/pull/28

[hsmaan]

Current documentation is completed. Soft goal is to have one custom analysis script to start (KNN classification), and will be expanded to other scripts in later PRs.

[hsmaan]

Added initial documentation and custom user data KNN classification script. Outstanding custom scripts include:

• Metrics + balanced metrics analysis
• DGE
• Trajectory inference
• Leiden clustering
• Cell type center distance + cell type support scripts