Add Caster's Glamour textures to Thought Knots

[joeyippee]

Thought Knots are incredibly useful as cheap, permanent storage for important hexes, more so than waxing focii, however its hard to sort through a collection of them at a glance without reading all their names individually. Adding Caster's Glamour functionality would make them further mirror focii, and make them just look a lot prettier.

Mockup textures pasted below, of a bow, infinity loop, trefoil, unknot, and a ball of yarn