Builtin support for linting other message formats

[mayank23]

Right now we only support either a custom message syntax validator or the ICU Message Syntax. We can start to add builtin support for other syntaxes

[tvarsis]

Hi!

I'm getting this error:

Is that related to this issue, or is that solvable by some configuration? We are using nested translation files where we group similar translations in to parent/child logic as seen in the error above.

Thanks!

[tvarsis]

Spend a couple of more hours with this and finally got it to work. The issue was that I didn't get the config merged correctly with existing eslint config.