Use accuracy field from Position information to alert user to potentially low precision of GPS coordinates

[pkalita-lbl]

The Position object returned by the getCurrentPosition function provided by the Capacitor Geolocation plugin provides an accuracy field that we do not currently use. We should take a closer look at what is returned in that field and determine if that might be useful to surface a warning to the user about low GPS accuracy.

Related, we could look into using the enableHighAccuracy option to request a more precise location. We should carefully read the docs in that case, because that might entail requesting additional device permissions.