Additional public transit mode icons
We have this old issue in Maps: GNOME/gnome-maps#86 (but I didn't seem to be able to move it here).
Basically, some of the missing ones (we already "train old" from that set).
- Trolley bus
- Monorail
- Horse-drawn carriage (this is probably mostly a novelty, but there's a code for it in GTFS :) )
- Taxi (in that context used for "communal taxi", i.e. book-in-advance rural public transit (typically a minibus taxi), but this icon could probably also be used in the map style for taxi stations