argparse: colorize the `--help` output with rich-argparse #2428

Job	Run time
No leftovers	3m 8s
Linters (lintreadme)	34s
CWL conformance (v1.0, docker)	6m 50s
Linters (shellcheck)	18s
CWL conformance (v1.0, singularity)	6m 37s
Linters (pydocstyle)	15s
build_test_container	10m 3s
CWL conformance (v1.0, podman)	7m 30s
CWL conformance (v1.1, docker)	7m 27s
Test on macos-latest	7m 9s
cwltool release test	13m 24s
CWL conformance (v1.1, singularity)	7m 59s
CWL conformance (v1.1, podman)	7m 55s
CWL conformance (v1.2, docker)	9m 2s
Tox (3, 9, lint)	31s
CWL conformance (v1.2, singularity)	9m 10s
Tox (3, 9, unit)	4m 58s
CWL conformance (v1.2, podman)	9m 51s
CWL conformance (v1.2, docker, --fast-parser)	9m 25s
Tox (3, 9, bandit)	25s
CWL conformance (v1.3.0-dev1, --relax-path-checks)	5m 54s
Tox (3, 9, mypy)	7m 6s
Tox (3, 10, lint)	34s
Tox (3, 10, unit)	4m 39s
Tox (3, 10, bandit)	21s
Tox (3, 10, mypy)	7m 7s
Tox (3, 11, lint)	40s
Tox (3, 11, unit)	4m 43s
Tox (3, 11, bandit)	47s
Tox (3, 11, mypy)	6m 29s
Tox (3, 12, lint)	29s
Tox (3, 12, unit)	6m 6s
Tox (3, 12, bandit)	41s
Tox (3, 12, mypy)	7m 10s
Tox (3, 13, lint)	40s
Tox (3, 13, unit)	6m 30s
Tox (3, 13, bandit)	43s
Tox (3, 13, mypy)	1m 10s
	3h 4m 20s

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