feat: add flag `--no-recurse` to disable recursion when reading workflows from directories
feat: added more tests to `TestPlanner`, renamed `TestJobFileInfo` to more appropriate name `WorkflowPlanTest`
style: changed error message to lowercase, added single quotes for better visibility
Co-authored-by: Casey Lee <cplee@nektos.com>
Currently setting workflows with the -W (--workflows) flag only accepts
a folder. It is not possible to run a single workflow.yml file.
This commit allows either a single file or a directory to be passed into
the workflows flag.