itsollie-m/modmail-queue ? reverse-engineered prompt

Build me a simple FIFO support ticket queue plugin for Modmail.

I want staff to be able to manage incoming support requests in the order they were received, so the oldest ticket gets handled first. The plugin should make it easy to add a user to the queue, see who is next, remove or skip someone when needed, and move through tickets cleanly without breaking the normal Modmail flow.

Please keep it focused on queue handling and basic ticket management, with clear commands or actions that feel natural inside Modmail. If there are any current Modmail docs or best practices I should follow, look them up online and use them.

Make it straightforward to install and use, and include sensible defaults so it works without a lot of setup.