chore: Removed Shopping Cart Module

- Moved all files and web templates from Shopping Cart to E-commerce module
- Made Shopping Cart module obsolete
- Moved select E-commerce related files from Portal to E-commerce module
- Minor cleanups
- Fixed Shopping Cart and Product Configurator tests
diff --git a/erpnext/templates/includes/cart.js b/erpnext/templates/includes/cart.js
index c390cd1..4de8ff7 100644
--- a/erpnext/templates/includes/cart.js
+++ b/erpnext/templates/includes/cart.js
@@ -48,7 +48,7 @@
 				const address_name = $card.closest('[data-address-name]').attr('data-address-name');
 				frappe.call({
 					type: "POST",
-					method: "erpnext.shopping_cart.cart.update_cart_address",
+					method: "erpnext.e_commerce.shopping_cart.cart.update_cart_address",
 					freeze: true,
 					args: {
 						address_type,
@@ -185,7 +185,7 @@
 		return frappe.call({
 			btn: btn,
 			type: "POST",
-			method: "erpnext.shopping_cart.cart.apply_shipping_rule",
+			method: "erpnext.e_commerce.shopping_cart.cart.apply_shipping_rule",
 			args: { shipping_rule: rule },
 			callback: function(r) {
 				if(!r.exc) {
@@ -198,7 +198,7 @@
 	place_order: function(btn) {
 		return frappe.call({
 			type: "POST",
-			method: "erpnext.shopping_cart.cart.place_order",
+			method: "erpnext.e_commerce.shopping_cart.cart.place_order",
 			btn: btn,
 			callback: function(r) {
 				if(r.exc) {
@@ -223,7 +223,7 @@
 	request_quotation: function(btn) {
 		return frappe.call({
 			type: "POST",
-			method: "erpnext.shopping_cart.cart.request_for_quotation",
+			method: "erpnext.e_commerce.shopping_cart.cart.request_for_quotation",
 			btn: btn,
 			callback: function(r) {
 				if(r.exc) {
@@ -254,7 +254,7 @@
 	apply_coupon_code: function(btn) {
 		return frappe.call({
 			type: "POST",
-			method: "erpnext.shopping_cart.cart.apply_coupon_code",
+			method: "erpnext.e_commerce.shopping_cart.cart.apply_coupon_code",
 			btn: btn,
 			args : {
 				applied_code : $('.txtcoupon').val(),