Update Docs and CI

See merge request !84

git subrepo clone (merge) --branch=v2.2 --force https://git.ufz.de/chs/HPC-Fortran-module-loads.git hpc-module-loads

subrepo:
  subdir:   "hpc-module-loads"
  merged:   "95ea68e"
upstream:
  origin:   "https://git.ufz.de/chs/HPC-Fortran-module-loads.git"
  branch:   "v2.2"
  commit:   "95ea68e"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "2f68596"

git subrepo clone (merge) --branch=v2.2 --force https://git.ufz.de/chs/cmake-fortran-scripts.git cmake

subrepo:
  subdir:   "cmake"
  merged:   "c6312e1"
upstream:
  origin:   "https://git.ufz.de/chs/cmake-fortran-scripts.git"
  branch:   "v2.2"
  commit:   "c6312e1"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "2f68596"

Prepare 0.6.1

See merge request !79

mLM related updates

See merge request !78

CI: update gitlab-runner to new EVE OS

See merge request !77

git subrepo clone (merge) --branch=v2.1 --force https://git.ufz.de/chs/HPC-Fortran-module-loads.git hpc-module-loads

subrepo:
  subdir:   "hpc-module-loads"
  merged:   "7767f2b"
upstream:
  origin:   "https://git.ufz.de/chs/HPC-Fortran-module-loads.git"
  branch:   "v2.1"
  commit:   "7767f2b"
git-subrepo:
  version:  "0.4.1"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "a04d8c2"

mo_datetime

See merge request !76