[keycloak-dev] Moving translations to a separate repository

I'm thinking of moving translations to a separate repository. The plan is to not have them included in the standard distribution and not part of the release. Often a release comes with changes to the English message bundles and we can't afford to wait for all translations to be updated before a release. The repository would have a page listing the languages and each language would have a maintainer listed (by Github username). Ideally we'd also have the page automatically updated with % keys translated and somehow figure out if it needs to be updated (in the event the English translation has changed). Adding translations to the base theme should be made as simple as possible. This will need some work to make as it's not simple at the moment to add additional translations as it requires a custom theme.