feat: network animator Trigger parameter support (#872)

* Added enhanced version of NetworkAnimator that allocates less garbage than before, supports Triggers but currently does not rely on netvars

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* NetworkAnimator updated with all the latest goodies. Var version is weird - we can't wait on serializing data till the tick end, this way we will most likely loose some of the netvar values which is potentially bad for trigger-based animations

* Test scene now shows both netvar and rpc-based network animators

* Fixed an issue when N.A. tries to set the value of an animator proeprty that's driven by animator curves

There is no reason to sync these parameter values - they are being indirectly updated via the layer state sync.

* Removed NetowrkAnimatorVar, removed dependency on Unity Chan prefab and replaced it with a nice spinning cube.

* Added some text with instruction on how to use the scene in runtime

* Removed UnityChan and changed some variable naming + formatting pass

Author: pdeschain