Add MapBox option

[kevinelliott]

Add the option to use MapBox. This might be challenging to maintain two map implementations, but the value is that the host can benefit from more premium map features if willing to pay for MapBox (though the free tier offers a ton of value, especially for small sites, which these Meshtastic mesh sites should be).

@daviesgeek I will coordinate with you when this becomes a need in the React app (and can help a lot).

[kevinelliott]

I have created a MapBox token for myself for dev and for the https://svm.meshinfo.network site.