Integrate `panacus` as a quantitative quality control tool and pangenome growth curve generator

[subwaystation]

Description of feature

Panacus can calculate quality control statistics of a pangenome graph. It also is able to find the pangenome growth curve.

• Create a nf-core modules using https://anaconda.org/bioconda/panacus
  • panacus/panacus
  • panacus/panacus-visualize
• Subworkflow panacus
• Add output PNGs to MultiQC config
• Update Documentation