Resin Bundle Pins

A simple add-on to Bundle Pins that adds support for resin pins to 1.21.1 with resin from Vanilla Backport.

---

The following extra files are also available:

• assets : resourcepack for the client to display the pin
• data : datapack for the server to register & craft the pin
• merged : resourcepack & datapack (assets & data) unified in one file, can be used interchangeably by client & server, but still needs to be on both!