Messages for JSON Schema draft-2019-09 and JSON Type Definition

Just tagging the original contributors here in case you'd like to extend, sorry to bother if you are no longer using it/interested.

Please make PRs to [v4](https://github.com/ajv-validator/ajv-i18n/tree/v4) branch (it will be merged/released soon) - files messages/index.js and messages/jtd.js

- [ ] ar (Arabic) - @Mahmoud-Mardeni, also requires review
- [ ] ca (Catalan) - @alexandreec
- [ ] cs (Czech) - @NAM0007
- [x] de (German) - @jmtoball, gflohr
- [ ] es (Spanish) - @jpablom
- [ ] fr (French) - @Telokis
- [ ] hu (Hungarian) - also draft-06 and 07
- [ ] id (Indonesian) - @ekoeryanto
- [x] it (Italian) - @lucacorti
- [ ] ja (Japanese) - also draft-06 and 07
- [ ] ko (Korean) - @MinByeongDon
- [ ] nb (Norwegian bokmål) - @mtramm, also draft-07
- [x] nl (Dutch) - @niekvb
- [ ] pl (Polish) - also draft-06 and 07
- [x] pt-BR (Português - Brasil) - @ggondim
- [ ] sk (Slovak) - @kiskovacs, also draft-07
- [ ] sv (Swedish) - @limmen, also draft-07
- [x] th (Thai) - @encX
- [x] zh (Chinese) - @leuction
- [x] zh-TW (Chinese - Taiwan) - @minipai

Anybody who is interested is welcome to contribute the messages.

Thank you!