Smoother camera movement with mouse/gestures

[nmfisher]

Manipulating the camera isn't nice and buttery smooth like threejs/babylon/etc (or even the filamentjs viewer).

I don't think this is a framerate issue, could be an issue with handling gesture detection via a Flutter widget that is blocking multiple times per frame?

[nmfisher]

threejs feels like it's instantly accelerating the camera in the pointer direction, then decelerates (not stop) when pointer is released