Warn if snakemake section isn't supported in current snakemake project based on snakemake version

[iromeo]

E.g. check min_version declaration and warn if not supported, e.g. template_enginge introduced only in 7.0.0

from snakemake.utils import min_version
min_version("6.0")

configfile: "config.yaml"

• https://snakemake.readthedocs.io/en/stable/snakefiles/writing_snakefiles.html?highlight=min_version#depend-on-a-minimum-snakemake-version