feat/idea: improve quiz experience by hiding answers in README

[glaucia86]

To make the learning experience more engaging without requiring external tools or issue tracking, we can enhance the quiz section in the README by hiding the correct answer inside a collapsible Markdown block (<details> tag).

This allows users to attempt the quiz before revealing the correct answer, keeping the experience interactive and self-contained within GitHub.

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✅ Proposed Solution

1️⃣ Update the Quiz Format in README

• Use Markdown collapsible blocks (<details>...</details>) to hide the correct answer so users can try answering before revealing it.

• Example update in README:

## 🧩 Quick Challenge!  
What was the main architectural challenge that Dinocrates faced?  

- [ ] Lack of materials  
- [ ] Navigation issues near the coast  
- [ ] Political instability  

<details>
  <summary>💡 Click to Reveal Answer</summary>
  ✅ **Correct answer:** Navigation issues near the coast.
</details>

✅ Impact:

🔹 Users engage with the quiz before checking the answer.
🔹 No need for external issue tracking or GitHub Actions.
🔹 Simple and fully compatible with GitHub Markdown.