Ci/add articles in yyyy/mm folder

[f-hollow]

Description

This PR updates the following:

• When creating an article using the hugo new content command, it won't add a timezone and will default to midnight (UTC+0).
• In the contribution guide instructions, added YYYY/MM to hugo new content example.
• Implemented CI checks:
  • Articles added in content/blog/ need to be in the current content/blog/YYYY/MM/ folder
  • Articles need to bear today's date without a timezone

Note

The commit test: add articles with issues in dates is for demo purposes only. It will be removed before merging.

Related

Testing

The workflow has been thoroughly tested in this PR.

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[Copilot]

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

[pedrominatel]

Thanks @f-hollow for preparing this enhancement! LGTM.

[FBEZ]

Nice, it works also on my machines.
I added a minor suggestion about adding the summary to the front-matter by default.

[f-hollow]

I set the check to make sure that the article date is today. Just because we already started merging articles with future dates, I will change the article date check to today or any time in the future.

[f-hollow]

As long as you agree on the summary, this PR is ready for merge.