Fancy rendering of printouts

[SquidDev]

This renders the contents of printed pages directly when holding them in your hand or displaying them in an item frame. Please note that this implementation isn't currently super optimal as we end up constructing TextBuffers every frame. I would like to get some feedback on a couple of things before going there.

Some things to discuss

• Item frame interaction is a little funky, as a lot of the behaviour is hard-coded for maps. The key problems are:

  • Rotating will use multiples of 45⁰ for angles (instead of map's 90), meaning it will stick out the side. We could invert the rotation and then apply our own in the event handler, but it's a little ugly.
  • We use the default item frame background instead of a solid one. I don't think this is too much of an issue as it's not normally visible (aside from on the edges), but is problematic when the map is rotated.

  While it would be possible to PR some extensions item frame rendering extensions into Forge for this, I'd rather discuss things here first.

Screenshots

Originally suggested in SquidDev-CC/CC-Tweaked#39.