Kaleidoscopes

Polish and fixes. Now the totally-already-existing item component works to control the kaleidoscope's view texture, and it's post-effect!

You can access this with /give @s kaleidoscopes:kaleidoscope_item[kaleidoscopes:kaleidoscope_overlay={texture:TEXTURE,post_effect:POST_EFFECT}]

No longer crashes the server on startup.

(almost) all assets are working now! Wooooo. yay.

Added icon, bumped version