Add a Spanish version of the Code of Conduct

[froi]

Hello there 👋🏼

I've added a Spanish version of the Code of Conduct along with some supporting changes to make the repo simpler to navigate.

• Added code-of-conduct-es.md: this is the main Spanish translation
• Added code-of-conduct-en.md: this is the new home for the English version of the CoC
• Refactored the README.md to help navigate to the language versions of the CoC
  • Refactor includes versions of the text in English and Spanish.

Why refactor the README? The main reason is that long READMEs often go unread and may be intimidatting to new users. It also helps to be friendly right of the bat. The different links point to the language version but also give pointers on how people can contribute to them.

I hope you all find this useful and look forward to feedback. ❤️ 🇵🇷

[tdooner]

Hi @froi , thanks for the work translating this! I'll merge this now, though I think we'll want to put the English language version back into the README since we link to it from many places, and just to make sure it's readily apparent. Ceci and I are going to work on this now, let me know what you think!