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/backend/store-in-token-architecture.md

@@ -365,12 +365,12 @@ The following permission dependencies now use token-based store context:
 - `require_all_store_permissions()` - Gets store from token, sets `request.state.store`
 - `get_user_permissions` - Gets store from token, sets `request.state.store`
 
-### Shop Endpoints
-Shop endpoints (public, no authentication) still use `require_store_context()`:
-- `app/api/v1/shop/products.py` - Uses URL/subdomain/domain detection
-- `app/api/v1/shop/cart.py` - Uses URL/subdomain/domain detection
+### Storefront Endpoints
+Storefront endpoints (public, no authentication) still use `require_store_context()`:
+- `app/api/v1/storefront/products.py` - Uses URL/subdomain/domain detection
+- `app/api/v1/storefront/cart.py` - Uses URL/subdomain/domain detection
 
-This is correct behavior - shop endpoints need to detect store from the request URL, not from JWT token.
+This is correct behavior - storefront endpoints need to detect store from the request URL, not from JWT token.
 
 ## Benefits of Store-in-Token