Add direction field to Observation Tower preset

[zbycz]

Description, Motivation & Context

It is useful to know which direction the observation tower looks. The field already exists.

tower:type=observation
direction=*

Links and data

Relevant OSM Wiki links:

• https://wiki.openstreetmap.org/wiki/Tag:tower:type=observation

Relevant tag usage stats:

• ca 500 combinations via overpass: https://overpass-turbo.eu/s/252b
• Example https://www.openstreetmap.org/edit?way=216865239

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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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[zbycz]

Test-Documentation

Preview links & Sidebar Screenshots

example link	screenshot
many tags
few tags

• using this overpass query limiting to numeric values only, because of this bug which I reported to iD.

Search

N/A - only field

Info-i

N/A - not adding a new field, but it works fine.

Wording

N/A

[andrewharvey]

looks good

[tordans]

LGTM.

I wonder if we should wait until openstreetmap/iD#11076 was fixed because I image the 0-360 value to be common and we don't want this to be removed by accident.