refactor: update content structure and layout templates

- Updated author format in content files
- Added section field to content files
- Simplified categories format
- Removed no-category.html layout
- Updated list.html and single.html layouts
- Updated index.html layout
- Updated generate-content.js script
- Do not index content with git

content/informatique/2023-08-guide-code-promo-honey/index.md

@@ -6,9 +6,10 @@ slug: "guide-code-promo-honey"
 wordpress_id: 220
 excerpt: "Dans le vaste univers du shopping en ligne, la quête de bonnes affaires et de réductions est devenue…\n"
 featured_image: "https://www.mistergeek.net/wp-content/uploads/2023/08/honey-extens-ion-code-promo.webp"
-author: {"id":1,"name":"Kevin"}
-categories: [{"id":14,"name":"Informatique","slug":"informatique"}]
+author: "Kevin"
+categories: ["Informatique"]
 tags: []
+section: "informatique"
 ---
 
 </p>