Lint in CI (GitHub Actions)

The ticket https://github.com/human-pangenomics/hpp_production_workflows/issues/1 is to check the bash shell by the check problem.

And I intend this ticket as linting WDL syntax in a tool such as [WOMtool](https://cromwell.readthedocs.io/en/develop/WOMtool/). And for the sustainable way, checking it on CI such as GitHub Actions is nice.

