Add animated transitions for shuttle positions

[bryantran24]

Improve the shuttle tracker experience by animating shuttle movement instead of updating positions instantly.

Also Shubble has a new API endpoint: https://api-shuttles.rpi.edu/api/velocities, see if it would be useful.

Reference implementation:

• https://github.com/wtg/shubble/blob/114908bb98f5cc504217e7c202b7677b8632ecac/frontend/src/locations/components/LiveLocationMapKit.tsx
• https://github.com/wtg/shubble/blob/114908bb98f5cc504217e7c202b7677b8632ecac/frontend/src/mapkit/MapKitAnimation.tsx