Create place_of_worship.json and Add Uniting Church in Australia

[Guerme]

Added place_of_worship.json to amenity category
Also added Uniting Church in Australia - https://uniting.church/

[bhousel]

I think we're excluding the religious items for now, though we do still want this eventually.
#5960 was a first attempt at adding a tree for them - I should probably check it out and see what's missing from it. I admit I don't remember now what the blockers were.