Adding DocTreePath and DocTreePathScanner similar to TreePath and TreePathScanner, respectively
Co-authored-by: Ralph Benjamin Ruijs <ralphbenjamin@netbeans.org>
Reviewed-by: jjg
Adding DocSourcePositions to allow access to DocTree starting/ending position
Co-authored-by: Ralph Benjamin Ruijs <ralphbenjamin@netbeans.org>
Reviewed-by: jjg, darcy