refactor: NewWorkflowPlanner (#648)

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>

cmd/input.go

@@ -27,6 +27,7 @@ type Input struct {
 	privileged            bool
 	usernsMode            string
 	containerArchitecture string
+	noWorkflowRecurse     bool
 	useGitIgnore          bool
 }