Are `i32` fixed point player coordinates viable?

[IntegratedQuantum]

This would greatly reduce memory usage, and might help with #310. How much precision within a block do we need for smooth movement? How big can the world be at that precision?

[Fyrstikkeske]

will a int32 or int64 be used, int16 is too small but might work if you have a struct with int16 and a int8.

ok im stupid, it said in title what will be used.