Support education tag per approved proposal

[bradlewt]

This PR models the education key like healthcare per the approved tagging proposal: https://wiki.openstreetmap.org/wiki/Proposal:Education_tag

Could you please add education=* for each of the educational facilities listed in the approved proposal? Thank you so much!

[tordans]

There is PR over at openstreetmap/id-tagging-schema#1472 that will add add those features to Rapid, iD and all consumers of the tagging schema presets.

If you have time, you can support this PR by starting the testing following the testing recommendations.