make building=train_station searchable

[novolife]

Description, Motivation & Context

openstreetmap/iD#7480
This is intentional so mappers don't confuse this preset with the Train Station preset.
#59
Since the naming is more precise now, I think we could make the train station building preset searchable.

Train Station Building is unsearchable due to the name could be chaotic, but we have many same building presets naming in same format and that means this could be searchable too.

Related issues

Closes #59
openstreetmap/iD#7480

Links and data

Relevant OSM Wiki links:

• https://wiki.openstreetmap.org/wiki/Railway_stations
• https://wiki.openstreetmap.org/wiki/Tag:building%3Dtrain_station

Relevant tag usage stats:

56,801

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## Test-Documentation

### Preview links & Sidebar Screenshots

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### Wording

- [ ] American English
- [ ] `name`, `aliases` (if present) use Title Case
- [ ] `terms` (if present) use lower case, sorted A-Z
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[novolife]

Test-Documentation

Preview links & Sidebar Screenshots

https://pr-1737--ideditor-presets-preview.netlify.app/id/dist/#locale=en&map=18.40/52.37694/9.74164&disable_features=boundaries&background=Bing&id=w265614707

Search

Info-i

Wording

• American English
• name, aliases (if present) use Title Case
• terms (if present) use lower case, sorted A-Z

[Dimitar5555]

It looks good!

Personally I would prefer if this preset didn't have a name field. Usually there is a separate node with the name of the train station.

[tyrasd]

This was originally created as an unsearchable preset in openstreetmap/iD#2116 (comment) because the name was clashing with the main railway=station preset. But after openstreetmap/iD#5903, the name clash has been fixed and it should now be clear enough hopefully.