Add overpass turbo query -> GPX to website

[kylecorry31]

trafficstars

Create a tool on the Trail Sense website that does the following:

1. Allow the user to enter a region (maybe using a map view) or center point + distance
2. Allow the user to enter the minimum peak height (in feet or meters)
3. Execute the query using the Overpass Turbo API
4. Download as a GPX file

After this is in place, link to it in the beacons user guide.