Clean F3 debug telemetry displaying actual speed in blocks per second.

Engine-level subsystems engineered for zero-allocation performance and sandbox player agency.
Real-time 3D velocity calculation measuring horizontal and absolute speed in bps.
Clean, native integration into the vanilla F3 debug overlay without clutter.
Tracks speeds on horseback, minecarts, boats, and high-velocity elytra flight.
Ultra-lightweight tick math with zero memory allocations or FPS drops.