Translate "Thinking in React"

[resir014]

This is the translated version of Thinking in React. I took some of the translations already available on the Crowdin, with some changes to follow the style guide. I'm going to add some personal notes for the reviewers to look at.

[resir014]

First pass of code review done, mas.

[regalius]

I think we'll only need to adjust several italicized words and common terms regarding to the glossary and we're good to go.. Thanks mas @resir014 !

[resir014]

@regalius Okay, done mas.

[gedeagas]

Awesome work @resir014 🎉. Thank you for contributing