enhance Snakemake report using labels

[sreichl]

• see other modules for inspiration (below are only examples)

• Implement labels → removes long paths and makes reports much cleaner!

  labels={
          "data": "{gene}",
          "type": "genome track",
          "misc": "ymax {}".format(ymax),
  }
  

• Implement the generic category structure

  category="{}_{}".format(config["project_name"], module_name),
  

• https://snakemake.readthedocs.io/en/stable/snakefiles/reporting.html#defining-file-labels