docs: add consolidated dev URL reference and migrate /shop to /storefront

- Add Development URL Quick Reference section to url-routing overview
  with all login URLs, entry points, and full examples
- Replace /shop/ path segments with /storefront/ across 50 docs files
- Update file references: shop_pages.py → storefront_pages.py,
  templates/shop/ → templates/storefront/, api/v1/shop/ → api/v1/storefront/
- Preserve domain references (orion.shop) and /store/ staff dashboard paths
- Archive docs left unchanged (historical)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/development/database-seeder/database-seeder-documentation.md

@@ -217,10 +217,10 @@ python scripts/seed_database.py [--reset] [--minimal]
 - Username: `admin`
 - Password: `admin123`
 
-### Store Shops
-- ORION: `http://localhost:8000/shop/ORION`
-- FASHIONHUB: `http://localhost:8000/shop/FASHIONHUB`
-- BOOKSTORE: `http://localhost:8000/shop/BOOKSTORE`
+### Store Storefronts
+- ORION: `http://localhost:8000/storefront/ORION`
+- FASHIONHUB: `http://localhost:8000/storefront/FASHIONHUB`
+- BOOKSTORE: `http://localhost:8000/storefront/BOOKSTORE`
 
 ### Theme Editors
 - ORION Theme: `http://localhost:8000/admin/stores/ORION/theme`
@@ -383,7 +383,7 @@ This creates 7 platform default pages that all stores inherit:
 - **Platform Defaults**: Created with `store_id=NULL`, available to all stores
 - **Store Overrides**: Stores can create custom versions with the same slug
 - **Automatic Fallback**: System checks store override first, falls back to platform default
-- **Navigation**: Pages marked with `show_in_footer` appear in shop footer automatically
+- **Navigation**: Pages marked with `show_in_footer` appear in storefront footer automatically
 - **Idempotent**: Script skips pages that already exist
 
 **Access URLs:**