feat: Slashed Prices and Discount display

- Registered mrp and price after discounts
- slashed price with discount in listing, item page and wishlist
- removed redundant imports
- renamed method to `get_web_item_qty_in_stock` to get Website Item stock
- adjusted styles for resizing
- made add to cart button full width on cards

erpnext/templates/generators/item/item.html

@@ -39,7 +39,7 @@
 			{{ doc.website_content or '' }}
 
 			<!-- Reviews and Comments -->
-			{% if shopping_cart.cart_settings.enable_reviews %}
+			{% if shopping_cart.cart_settings.enable_reviews and not doc.has_variants %}
 				{% include "templates/generators/item/item_reviews.html"%}
 			{% endif %}
 		</div>

erpnext/templates/generators/item/item_add_to_cart.html

@@ -7,9 +7,21 @@
 	<div class="col-md-12">
 		<!-- Price and Availability -->
 		{% if cart_settings.show_price and product_info.price %}
+		{% set price_info = product_info.price %}
+
+		{% if price_info.formatted_mrp %}
+			<small class="formatted-price">
+				M.R.P.:
+				<s>{{ price_info.formatted_mrp }}</s>
+			</small>
+			<small class="ml-2 formatted-price" style="color: #F47A7A; font-weight: 500;">
+				{{ price_info.get("formatted_discount_percent") or price_info.get("formatted_discount_rate")}} OFF
+			</small>
+		{% endif %}
+
 		<div class="product-price">
-			{{ product_info.price.formatted_price_sales_uom }}
-			<small class="formatted-price">({{ product_info.price.formatted_price }} / {{ product_info.uom }})</small>
+			{{ price_info.formatted_price_sales_uom }}
+			<small class="formatted-price">({{ price_info.formatted_price }} / {{ product_info.uom }})</small>
 		</div>
 		{% else %}
 			{{ _("UOM") }} : {{ product_info.uom }}