feat: Offer Display

- Added offers section in website item
- Added more roles to website item
- Fixed attachment limit issue in website item
- Created Website Offer child doctype
- Added offers listing in Item full page view
- style fixes

erpnext/templates/generators/item/item_details.html

@@ -2,7 +2,7 @@
 <div class="col-md-7 product-details {{ width_class }}">
 <!-- title -->
 <h1 class="product-title" itemprop="name">
-	{{ item_name }}
+	{{ doc.web_item_name }}
 </h1>
 <p class="product-code">
 	<span>{{ _("Item Code") }}:</span>