feat: add creating articles skill

[MounirDhahri]

Thanks to this #777 it was easier to write a skill to make writing blog posts easier with Claude.

My prompt was the following:

I want you to generate an agent skill on writing articles based on the docs of authoring articles (Only step 1 and 2 ). I want it to refer to the doc that we
  created instead of having a different markdown document. Follow the best practices here
  https://platform.claude.com/docs/en/agents-and-tools/agent-skills/best-practices. When a user prompts to generate an article, ask them which template they want to use
  and show them a drop down from the available templates. Also ask them for their name and see if it's available in _config.yml.  

I tried this locally to generate my next article and it worked pretty well. I think the result wouldn't have been as good if I were to give it no details (tried that a few months ago - but with a worse model)

Screen.Recording.2026-01-08.at.15.38.35.mp4

I think this is as is, is fine, but maybe I could have been stricter with the best practices and added more checkboxes to track progress as suggested on the best practices (thanks @anandaroop for showing them to me)

[anandaroop]

Very nice!

Just one bikeshed comment about naming below.

[anandaroop]

suggestion (non-blocking): Maybe consider giving this a name like "creating-articles" or "adding-articles" just to be a tad clearer that the skill is not meant to actually write the blog post for you.

[MounirDhahri]

good idea