Add feature of support half-precision-float for synchronising transform

[TLabAltoh]

Currently, this sample demo project uses 254 kbps for send data from client to server. And I found this article, I can't say for certain, but maybe most of multiplayer game uses only 20 kbps for internet data ?

This project currently doesn't support half-precision float, and it could reduce bandwidth by almost half if implemented.

[TLabAltoh]

It seems that com.unity.netcode.gameobjects, a unity package, uses the Unity.Mathematics library for conversion.

https://github.com/search?q=repo%3AUnity-Technologies%2Fcom.unity.netcode.gameobjects+math.half&type=code

[TLabAltoh]

Currently this feature cannot be toggled per game object. Need to add this scripting define symbol in the project settings.

TLAB_VRPROJ_USE_HALF_FLOAT
TLAB_SFU_USE_HALF_FLOAT

I don't know if it works properly at this point, but at any rate it should reduce bandwidth per client by half.