Add layer=1 to building=roof preset

[karsonkevin2]

Building=roof is used to denote a structure which is just a roof, passage underneath this roof via foot or car is possible.
https://wiki.openstreetmap.org/wiki/Tag:building%3Droof

It is pretty typical that their might be a highway=service &service=drive-through or a highway=footway passing underneath the roof. With the current roof preset, this leads to conflict as the roof and highways default to layer=0. In essentially all cases, the roof should be layer=1 or a higher layer if necessary. Defaulting to layer=1 for roof objects represents this reality.

Currently, 43% of roofs include layer=*, which would have to have been manually entered.
https://taginfo.openstreetmap.org/tags/building=roof#combinations

[tyrasd]

Could you please change this to use the addTags syntax for this? Here's an example. Otherwise a roof with, say, layer=2 would not match the preset anymore.