Ancient cyphers

[Robotgiggle]

Adds ancient cyphers, as seen in #818. Implements #432.

• Ancient cyphers generate in loot chests, and come preset with a simple hex
• They look like normal cyphers but with tarnished copper and slightly faded amethyst, and work identically
• Unlike normal cyphers, they display their stored hex in the tooltip, so they can serve as a tutorial for new players
• You can also erase them and put in your own spells using Craft Cypher
• Configurable injection list and injection chance for ancient cyphers, just like how it works for lore fragments

[SamsTheNerd]

I think the config system here could use some work, ideally have it be datapackable and not stuffed all into a List. Arguably that could be done later? But I'd rather not have it be a breaking change later with dropping support for this config system.

Otherwise just small changes.

[SamsTheNerd]

Actually, if we wanna just leave it non configurable and have it be hard-coded for now then we could figure out the datapack support in the future without locking us into this? I'd like to get more datapack infrastructure set up based around Codecs at some point in the future.

[SamsTheNerd]

looks good to me. left some small nitpicks. Otherwise fine to merge