Update play animation based on changes to the params

Right now changes to the riveParams passed into the useRive hook aren't listened to. E.g if you try to change the animation as follows, it will not update when isDark changes:

const params = {
    src: 'lightdarkmode.riv',
    autoplay: true,
    animations: isDark ? "dark" : "light", // this is not working 
};

These changes should be listened to and update the current file. We will do this by creating a new instance of the animation/state machine with these updated values, meaning any previous artboard state will be lost. If previous artboard state wishes to be kept, the user should use stop()/play() instead

Start by locating the useRive hook implementation and tracing how riveParams create the current animation instance. Verify the behavior with the isDark example: changing animations should create a new instance using the updated values, with previous artboard state intentionally discarded.