Create a "CWL linter" tool

[melibleq]

Following a suggestion from @kinow, the idea is to have a cwl-linter module to inspect workflows and detect possible improvements in the code.

Related: common-workflow-lab/wdl-cwl-translator#127 and rabix/cwl-format#18

[kinow]

And maybe have something that can re-write worfklows too. Similar to Python's black, or isort for imports. It could sort the sections of a CWL document, e.g.: https://github.com/common-workflow-lab/wdl-cwl-translator/pull/172/files#diff-b5a65c2befbbd0b6453805272729b622f41b2be683f8258432e08f4370332265R83

[mr-c]

@kinow , yep, content reordering is already a feature of cwl-format https://github.com/rabix/cwl-format/blob/master/cwlformat/keyorder.yml

cwl-format hasn't had a release in a while, though.