feat: ✨ Links to openfeedbacks

[gouz]

Closes #22

Description des modifications

Add links to OpenFeedBack website on each session to allow a vote and give feedbacks to the author.

Liste de contrôle

• Je n'ai pas surdimensionné ma PR
• Le titre de ma PR correspond à la convention de commit
• Je n'ai pas inclus de modifications majeures
• J'ai effectué ma propre relecture de code avant d'en demander une

J'ai inclus des tests unitaires qui couvrent mes modifications

• 👍 oui
• 🙅 non, car ils ne sont pas nécessaires
• 🙋 non, car j'ai besoin d'aide

J'ai ajouté/mis à jour la documentation concernant mes modifications

• 📜 README.md
• 📕 docs/*.md
• 🙅 aucune documentation nécessaire

Point technique/remarque

I think we can improve the a11y with bigger icons and a look like buttons

[taorepoara]

Thanks @gouz for this PR.
You're right, the icons could be bigger and we can give them a look of a button.

For the unit tests, you can check that every session in the camping-data.js file has a openfeedback link.

You also should add the openfeedback link in the session pages.

[gouz]

Thanks @gouz for this PR. You're right, the icons could be bigger and we can give them a look of a button.

For the unit tests, you can check that every session in the camping-data.js file has a openfeedback link.

You also should add the openfeedback link in the session pages.

All done ;) Thanks for the advices

[taorepoara]

Seems OK. Thanks again !
This PR also made me think that I forgot to add the favorite button in the session page ^^