2.0.0-alpha.34 for 1.21

Solved certain serializations being invalid, causing client disconnects in some cases. (@enjarai)
Improved book tutorials. (@enjarai)
Made impulse grace more sensible. (@enjarai)
Majorly improved the depth available to the editing screen.
- Fixed doubles being downcast to floats, which resulted in precision loss. (@enjarai)
- Made the available depth virtually infinite. (@StellarWitch7)
Fixed a slight issue with the spell writing trick. (@StellarWitch7)
Fixed the main hand spell being rendered in front of the player when editing the offhand scroll. (@StellarWitch7)
Stopped the server from syncing mana to clients, as it is unneeded. (@StellarWitch7)
Fixed a broken internal book link. (@StellarWitch7)