Add locale files for each language

[davydovanton]

• [ ] cs.yml
• [ ] da.yml
• [x] ~~de.yml~~
• [ ] el.yml
• [x] ~~en.yml~~
• [x] es.yml
• [x] ~~fr.yml~~
• [ ] hi.yml
• [x] ~~it.yml~~
• [x] ~~ja.yml~~
• [ ] ko.yml
• [ ] nl.yml
• [ ] no.yml
• [ ] pl.yml
• [x] ~~pt-br.yml~~
• [ ] pt.yml
• [x] ~~ru.yml~~
• [ ] sv.yml
• [ ] ta.yml
• [x] ~~uk.yml~~
• [ ] zh-cn.yml
• [ ] zh-tw.yml

[felixbuenemann]

I can contribute a German translation, I can make a PR.

[davydovanton]

@felixbuenemann wow, it would be fantastic!

[felixbuenemann]

Done, see #54. I already translated it two days ago, but forgot to do the PR, because this issue said after 1.0.