fix: correct YAML frontmatter, convert images to proper WebP format

- Moved image: field from outside to inside YAML frontmatter (50 files)
- Converted all 56 non-WebP images to proper WebP format via ImageMagick
- Fixed Python shebangs for portability
- Updated source fields in 2 Task 3 recipes

Crispy_Roasted_Chickpeas_(Garbanzo_Beans).cook

@@ -1,9 +1,9 @@
-image: https://roux.roo.lol/recipe-images/crispy-roasted-chickpeas-garbanzo-beans-2.webp
 ---
 title: Crispy Roasted Chickpeas (Garbanzo Beans)
 servings: 2
 category: Snack
 source: Unknown
+image: https://roux.roo.lol/recipe-images/crispy-roasted-chickpeas-garbanzo-beans-2.webp
 ---
 
 Preheat the oven to 400°F.