Implement i18n and l10n support for hints

[nlochschmidt]

No description provided.

[raderio]

Is there ETA for this?

[magro]

@nlochschmidt do you have plans to work on this?

[nlochschmidt]

Yes, but I need to design the API for #3 first.
Regarding i18n, multi-platform is the tricky part here. I like the way https://github.com/valiktor/valiktor does it, but it relies on java.util.ResourceBundle.

[magro]

Ok, thanks!

[dhoepelman]

Thinking of doing this with customs properties, see #48

[dhoepelman]

I think with #155 and #167 there are enough tools for the user to do this. You can do things like this:

val validation = Validation<User> { User::age { minimum(0) hint "{some id for the i18n library}" }}

val localized = validation.validate(...).errors.map { it.copy(hint = localize(it.hint) } }

or

val validation = Validation<User> { User::age { minimum(0) userContext I18nLibrary.someReference } }

val localized = validation.validate(...).errors.map { it.copy(hint = I18nLibrary.localize(it.userContext as I18nLibraryRef) } }