Does we have any docs of how to create new grammar/rules for inverse text normalization for a new language?
**Is your feature request related to a problem? Please describe.**

I want to create ITN grammar for the Ukrainian language. As we already have one for Russian I think it would be easy to create a new one for Ukrainian (as it has almost the same rules a Russian).

**Describe the solution you'd like**

I'm looking for some docs or guides on how to create a new grammar for Inver Text Normalization for a new language?

**Describe alternatives you've considered**


**Additional context**

