[articles][vm-design] Add Spanish translation

[fernape]

Summary

Add the Spanish translation for vm-design.

Most of the work was done with Weblate

Test Plan

• Apply patch and make the documentation
• The result can also be seen in the weblate docs ci page
• Opening the document in the browser and looking for old docbook tags shows none
• Looking for rogue asciidoc special characters and tags shows none
• Accent keys look good
• I used @POFileSpell@ to spell check the translation

Note that I chose not to translate some terms like kernel because
they are commonly used as is even in spanish documentation and web pages.

Adding carlavilla to the review :-)

[0mp]

If it passes all the QA you've listed, I think it's good to go.

[fernape]

In D29646#669064, @0mp wrote:

If it passes all the QA you've listed, I think it's good to go.

I'll wait a couple of days and see if @carlavilla peruses through the review.

Thanks!

[carlavilla]

Adelante caballero :)

[fernape]

Thank you!