Plotting Mutational Signatures and Mutational Spectra // Plotting functions for mutational signatures and mutational spectra, including single base substitutions (SBS), doublet base substitutions (DBS), and small insertions and deletions (indels). Generates plots similar to those used previously in Alexandrov et al. (2020)doi:10.1038/s41586-020-1943-3 and Rozen et al. (2026)doi:10.5281/zenodo.18451842.