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

Orange Rolls.cook

@@ -1,4 +1,3 @@
-image: https://roux.roo.lol/recipe-images/orange-rolls.webp
 ---
 title: Orange Rolls
 servings: 8
@@ -9,6 +8,7 @@ tags:
   - breakfast
   - rolls
   - orange
+image: https://roux.roo.lol/recipe-images/orange-rolls.webp
 ---
 
 Make the dough: Heat the #oven to 375°F. Place @light brown sugar{1/3%cup} in a small #bowl and zest the @orange{1} directly over it. Gently rub the zest into the sugar and transfer 2 tablespoons/25 grams of the orange sugar to a large #bowl to use for the dough. Save the rest of the orange sugar for the filling.