[ISSUE] <!--Link--> to a directory not working (class ...Directory cannot be cast to ...ProjectFile)

[lestephane]

markdown

<!---[Link](itests/src/test/scripts "automated tests")-->

(the directory exists)

documaid generate result:

[INFO] --- documaid:0.9.25:generate (default-cli) @ aws-lambda-parent ---
[INFO] DocuMaid started
[ERROR] DocuMaid finished with 1 errors.
[ERROR] class de.quantummaid.documaid.collecting.structure.Directory cannot be cast to class de.quantummaid.documaid.collecting.structure.ProjectFile (de.quantummaid.documaid.collecting.structure.Directory and de.quantummaid.documaid.collecting.structure.ProjectFile are in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @6a9b0a6f)

[lestephane]

completely rewrote the bug report based on the understanding gained from #25