no graceful or informative error handling with unknown files

[maxandersen]

In trying to migrate jbang.dev I have some .java files in my _posts folder (to allow asciidoc includes to work) and that screws up quarkus roq.

If I delete the .java file things start working again.

2 issues here:

1. no where in the error info is it possible to deduce this is caused while processing the file content/posts/myapp.java. It should otherwise roq just looks broken rather than pointing to the input files having issues.
2. why is roq trying to treat files with no frontmatter in the posts folder?