Add Real Python resource to curated links

[freya-docs]

What does this PR do?

This PR adds a new resource for practical Python tutorials.

Is this your first open source contribution?

no

Did you follow CONTRIBUTING.md?

• I claimed the issue in a comment before starting
• [ x] My branch follows the naming convention (add-resource/..., fix-typo/..., etc.)
• [x ] My commit messages are clear and use the imperative form
• [ x] My change does only what the issue asked for — no unrelated edits

Linked issue

Closes #7

Cohort reference (optional)

[github-actions]

Hi! This looks like your first pull request to this repo — welcome. 🎉

A maintainer will take a look soon. While you wait:

• Make sure CI is green (the markdown lint check is informational and won't block your merge).
• Feel free to update the PR with more commits if you spot something — we won't squash until merge.
• If we ask for changes, that's normal — every PR, including ones from senior engineers, gets feedback.

Thanks for contributing.