Add amenity=waste_disposal to a future version of the schema

[SomeoneElseOSM]

Currently at https://taginfo.openstreetmap.org/keys/amenity#values there are 285k of these worldwide, so it's a frequently used value. Usage is spread fairly evenly across the world https://taginfo.openstreetmap.org/tags/amenity=waste_disposal#map ; It is used more in the northern hemisphere than the south, but there is widely spread out. It's documented at https://wiki.openstreetmap.org/wiki/Tag%3Aamenity%3Dwaste_disposal .

It would add value to a general purpose map style that may want to use the Shortbread schema.

It would make sense to add it to: https://shortbread-tiles.org/schema/1.1/#layer-pois to mirror amenity=waste_basket et al.