Add Greyhound bus stations / stops

[tas50]

Another super common private bus stop / station that should get into the index.

[1ec5]

Part of #2864.

[tas50]

@1ec5 I thought a good start would be tackling the commercial transit side of things since those are standard brands. These 2 are easy additions.

[1ec5]

In that case, we could reopen and merge #2863. It’s a fine place to start, though as I expressed in #2863 (comment), I do hope we can find a way to add network tags to the picture, given that network is more practical and relevant than brand for this kind of infrastructure.

[bhousel]

Ah yeah, this is a thing I've kind of been putting off, sorry..

My rough thinking on this is... if you go to https://nsi.guide, you see this:

That's because we are treating the brand:wikidata almost as a "natural key" (sort of, but not really, as they aren't unique).
brand:wikidata tag is that important link between OSM and wikidata.

For some other types of features that will be operator:wikidata or network:wikidata or something else maybe.

So we need some way of handling alternate trees for entries to live under. Right now everything is under brands/ and we need to grow beyond that. It changes a lot of stuff about how the project is organized (including code), but will let us do a lot more too.

[bhousel]

This was done! There's a transit tree now and Greyhound Lines is in it:
https://nsi.guide/index.html?t=transit&k=route&v=bus&tt=grey#greyhoundlines-1d67e7