Show distance to stop when geolocation is enabled

[jgibson02]

Description:

When the user has enabled the map's GeolocateControl and it is successfully providing location, whenever details on a stop is displayed the distance to that stop should be shown.

Risks:

Possible performance degradation if distance calculations are done inefficiently

Acceptance Criteria:

• Distance to stop is shown only when the user's location is successfully being tracked by GeolocateControl
• Any instances where a list of stops are provided or the user is looking at details for a specific stop the distance to each stop should be shown.
• For now, the distance should be represented in miles to 1 decimal place.
• The distance is calculated using the @turf/distance module