v0.2.1

Summary

Adds a toggleable Dreeve Routes overlay for the OpenStreetMap iD editor.

What is new

• OpenStreetMap iD support via /edit (Background → Overlays → Dreeve Routes)
• Overlay listed just below OpenStreetMap GPS traces when available
• Map emoji label for the overlay entry
• gpx.studio and Wanderstories behavior unchanged

Supported sites

• gpx.studio
• studio.wanderstories.space
• www.openstreetmap.org/edit (iD editor)

Closes #1