fix(TrackballControls): invalidate on user input with demand frameloops

[DevTomUK]

Fixes #2745 (same problem as #1588 and #708)

TrackballControls is dead on arrival with frameloop="demand". The three-stdlib impl only applies pointer input inside update(), which drei runs in useFrame — but in demand mode no frame ever gets requested, so update() never runs and nothing you do produces a render. OrbitControls doesn't have this issue because its impl updates straight from the pointer handlers.

Fix: invalidate on the controls' start event, and on pointermove/touchmove while interacting. Wheel is covered too since it fires start per event.

Tested in a demand-frameloop sandbox: before, dragging renders nothing and the camera never moves; after, drag and wheel both work and damping settles on its own.

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