fluentDrawerEnter function
The drawer arriving: fluentDrawerDuration on curveDecelerateMid.
Decelerating, because the panel is arriving somewhere and stopping there.
Implementation
FluentMotionSpec fluentDrawerEnter(FluentDrawerSize size) => FluentMotionSpec(
duration: fluentDrawerDuration(size),
curve: FluentCurve.decelerateMid,
);