Add badge filtering and shop category to the site

- Introduced a new 'shops' category in the build script and README.
- Implemented badge filtering in the filter functionality, allowing users to filter entries by badge.

README.md

@@ -33,10 +33,13 @@ The generated site will be in the `dist/` folder.
 
 Create a Markdown file in the appropriate `content/` subfolder:
 
-- `content/products/` - Swedish products
-- `content/services/` - Swedish services  
-- `content/experiences/` - Swedish experiences
-- `content/manufacturers/` - Swedish manufacturers
+| Folder | Category | Description |
+|--------|----------|-------------|
+| `content/products/` | Produkter | Physical Swedish products (e.g., Dalahäst, Orrefors glass) |
+| `content/manufacturers/` | Tillverkare | Companies that design/manufacture products (e.g., Fjällräven, Hasselblad) |
+| `content/shops/` | Butiker | Retail stores selling products (e.g., Göteborg Manufaktur) |
+| `content/services/` | Tjänster | Service providers, both physical and digital (e.g., SJ, Mediaflow) |
+| `content/experiences/` | Upplevelser | Experiences, events, and cultural activities (e.g., Icehotel, Midsommar) |
 
 ### Content Format