Add translatable strings to social_facility:for field

[kjonosm]

Approved values only

[github-actions]

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[tyrasd]

I'd use the plural form for the values and be a bit more specific in some cases. See inline suggestions below.

Also, could you please add the missing values from the list in the wiki, i.e. dementia, displaced, terminally_ill, unemployed, veteran and woman. Yes, these are relatively rare, but in my opinion they do make sense to be offered.

//edit: PS:

Approved values only

In this case, I would go with the list on the wiki page, as the tag has clearly evolved slightly after the proposal phase. E.g. the value under_privileged is now practically unused compared to underprivileged.