11655: show warning if invalid ref:REI input tag is found

[ankushKun]

Implements #11655

Added REI tag validation logic to modules/validations/invalid_format.js
Added en localization for the same to data/core.yaml

When an invalid value is entered to a ref:REI tag, a warning is displayed to the user

Valid formats: A string of length 8 characters 00000000 or in the format 00-00-0000

[tordans]

@ankushKun please review the codebase on how alerts like this are handled. IMO you will find that we do not add them on a tag by tag basis manually deep in the code but instead search for abstractions like id-tagging-schema and similar.

[ankushKun]

@tordans should I be adding the ref:REI tag to https://github.com/openstreetmap/id-tagging-schema first? since I cannot find it anywhere in the current codebases

[matkoniecz]

@tordans Can tagging schema support such validations? Do we have any such formats specified there?

[ivanbranco]

Valid formats: A string of length 8 characters 00000000 or in the format 00-00-0000

The REI reference doesn't include dashes, so the only valid format should be an 8 character string. More precise validations could be added (e.g. the first three characters are always letters), but even a simple length check would already be useful.

[k-yle]

rather than hardcoding random tags, it would be better to use id-tagging-schema's existing pattern field, if at all.

This requires the key ref:REI to be defined in the tagging schema first. I think this is a good thing, because:

1. it makes us go through the usual process of determing whether ref:REI deserves a field in the UI
2. iD's validation issues should be fixable. A warning about a tag that's hidden in the UI is likely to be confusing for new users.

It's also worth considering if this warning is actually a good idea. What are mappers supposed to do if the value is invalid? Perhaps this would be better suited for osmose?