Allow for the Calendar to display its tooltip in a popup when moused over in a Item frame. This adds both style and convenience to the calendar and falls in line with how actual players interact with said item.

As of version 2.0, all items and blocks have been moved to Fabric Seasons: Extras. The calendar item has been remade, and you can now place it on a wall and it'll show up a tooltip popup if you sneak.

I may end up making a PR for this depending on my workload