Function load_dirent

fn load_dirent(
    dir: &CheckedDir,
    entry: &DirEntry,
    name: &Path,
    overrides: &HashMap<PathBuf, LoadOptions>,
) -> Result<Option<ParsedConnectPoint>, LoadError>

Helper for load_dir: Read the element listed as entry within dir.

This is a separate method to help make sure that we capture every possible error while loading the file.

Return Ok(None) if we are skipping this DirEntry without reading a ParsedConnectPoint.