Add Spanish laguage to hexojs/site

[rodrom]

Check List

• I have already read README.
• I have already searched existing issues.
• I have already searched existing pull requrests.

Feature Request

I would like to help in the translation of hexojs/site to Spanish. I've already forked the project, but there is not an associate project in Crowdin.

Thanks,

Additional context

No response

[rodrom]

Hi again, thanks for adding Spanish as a language in Crowdin.

I have just one question, as this is my first time using this collaborative service and contributing to this project. Is it mandatory to use Crowdin, or can I use my own tools?

Can I follow the instructions to create a new language directly in the source code, track the changes using Git, translate the Markdown files, push a new branch to my fork, and then submit a pull request to the official repository?

I suppose I must use Crowdin, but I just wanted to check, as I think working directly in the source code is faster. However, I understand that it might be less efficient for collaborative translation contributions and the project's workflow and tools.