[translation]: Update Spanish translations for contributing documentations

Update the following in Spanish from their English version available in /docs directory:

• /docs/spanish/CONTRIBUTING.md from its english version at /CONTRIBUTING.md

• /docs/spanish/README.md from its english version at /docs/README.md

• /docs/spanish/how-to-catch-outgoing-emails-locally.md from its english version at /docs/how-to-catch-outgoing-emails-locally.md

• /docs/spanish/how-to-setup-freecodecamp-locally.md from its english version at /docs/how-to-setup-freecodecamp-locally.md

• /docs/spanish/how-to-work-on-coding-challenges.md from its english version at /docs/how-to-work-on-coding-challenges.md

• /docs/spanish/how-to-work-on-guide-articles.md from its english version at /docs/how-to-work-on-guide-articles.md

Once you are ready please make a pull request, preferably one for each file.

When you make a PR for this particular issue, do not tag it with Closes #XXXXX instead just reference it with #XXXXX

[Willibaur]

Hi there, It would be good if checkboxes at the top are checked so we can see what is left to be translated. Thanks

[tomaspozo]

Hola! to all. I believe we should have guidelines for Spanish translations, which include what treatment (formal or informal) to use when referring to actions or the user. For example, Agregue (formal) or Agrega (informal). - I don’t know if this kind of things are found in other languages.

In the last articles I’ve read I’ve seen a mix between formal and informal, and I think we should standardize (I have done it with some articles). I propose to always use informal.

Another thing that could be specified in the guidelines is:

Challenges translations. Should they be translated? Referrals to types and attributes (which need to be in English for proper coding). For example, type “date” not type “fecha”.

If there is a guideline already, please let me know, if not, I would be happy to start one (just let me know where to put it).

Hey @raisedadead I would like to know your thoughts about this.

Thanks to you all and happy coding!