Implement translation pipeline

[3y3]

Allow to translate initial documentation to other languages in automatic or semi automatic mode

• [x] Implement CommonMark translation fragments extraction and composition
• [x] Implement YFM translation fragments extraction and composition
• [ ] Implement precise inline markdown wrapping
• [x] Implement automatic translation API
  • [ ] Add documentation
  • [ ] Add tutorial for Yandex Translation API
  • [ ] Improve CLI integration
• [x] Implement semi automatic translation API
  • [ ] Add documentation
  • [ ] Add tutorial for SmartCat system
  • [ ] Improve CLI integration
• [ ] Implement json translation for toc.yaml and any other json-schema described format