I’m working on a webpage to enable Shotcut users to produce reasonably professional-looking scrolling (or not) credits by providing the cast, location, producer etc as simple text, then clicking a few buttons to provide animation to the text (such as can be seen here: Video Title made with Elusien's Textflow feature and Overlay HTML filter) if desired or choose fonts (including some Google fonts) etc.
The webpage will produce an HTML/CSS file that can then be used as an Overlay HTML Filter. Similar to the way my gl-transition framework functions. I hope to have a version for people to try out by the end of this week.