feat: add tuto chromatic

[AliceLeRaptor]

Lien vers l'env de test : https://blog.staging.eleven-labs.com/feat/tuto-chromatic/

[github-actions]

⚡️🏠 Lighthouse report

Here's the summary:

Path	Performance	Accessibility	Best practices	SEO	PWA
/feat/tuto-chromatic/	🟠 88	🟢 100	🟢 100	🟢 92	🟠 70
/feat/tuto-chromatic/fr/authors/ajacquemin/	🟠 69	🟢 100	🟢 100	🟢 92	🟠 70
/feat/tuto-chromatic/fr/comment-construire-site-web-avec-nextjs/	🟠 74	🟢 98	🟢 92	🟢 100	🟠 70
/feat/tuto-chromatic/fr/nestjs-le-cycle-de-vie-dune-requete/	🟠 71	🟢 98	🟢 92	🟢 97	🟠 70

Here's the audits:

Path	FCP 1800 <=	LCP 2500 <=	Speed Index 3400 <=	TTI 3800 <=	TBT 200 <=	CLS 0.1 <=
/feat/tuto-chromatic/	🔴 2767	🔴 3071	🟢 2767	🔴 4362	🟢 7	🟢 0
/feat/tuto-chromatic/fr/authors/ajacquemin/	🟢 1703	🟢 2223	🟢 2130	🔴 4026	🟢 10	🟢 0
/feat/tuto-chromatic/fr/comment-construire-site-web-avec-nextjs/	🔴 2277	🔴 2717	🟢 2468	🔴 4735	🟢 6	🟢 0
/feat/tuto-chromatic/fr/nestjs-le-cycle-de-vie-dune-requete/	🔴 2591	🔴 6675	🟢 2591	🔴 4286	🟢 7	🟢 0

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 18.3%, saving 64.10 KB.

Filename	Before	After	Improvement	Visual comparison
_assets/tutorials/2024-03-27-chromatic/turbosnap-pepperidge.jpg	76.89 KB	53.91 KB	-29.9%	View diff
_assets/tutorials/2024-03-27-chromatic/ui-tests.png	37.73 KB	31.08 KB	-17.6%	View diff
_assets/tutorials/2024-03-27-chromatic/ui-tests3.png	70.28 KB	60.67 KB	-13.7%	View diff
_assets/tutorials/2024-03-27-chromatic/ui-tests4.png	77.95 KB	67.61 KB	-13.3%	View diff
_assets/tutorials/2024-03-27-chromatic/ui-tests5.png	50.09 KB	41.52 KB	-17.1%	View diff
_assets/tutorials/2024-03-27-chromatic/ui-tests6.png	36.68 KB	30.74 KB	-16.2%	View diff

1160 images did not require optimisation.