Jazz Tangcay Artisans EditorThe late lyricist Howard Ashman gave us the gift of many of the most-loved Disney songs of the modern era, teaming with composer Alan Menken to write “Beauty and the Beast’s” “Be Our Guest,” “The Little Mermaid’s” “Part of Your World” and “Aladdin’s” “Friend Like Me.” In the new documentary “Howard,” streaming on Disney Plus from August 7, director Don Hahn — who knew his subject well, having produced the original animated version of “Beauty and the Beast” — goes in