[Feature] Shipping Rule Calculation based on Net Weight (#11770)

* [new] Calculate shipping tax based on weight

* [fix] Change field name weight to weight_per_unit in SI Item

* [new] Shipping Rule based tax for selling module

* [new] Shipping rule based on weight added to Buying module

* [fix] Conflict in jsons

* [fix] Removed Redudant add_fetch

* [fix] Codacy fixed

* [fix] Print hide added
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index bfb2593..790be71 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -242,7 +242,9 @@
 		"supplier": item.default_supplier,
 		"update_stock": args.get("update_stock") if args.get('doctype') in ['Sales Invoice', 'Purchase Invoice'] else 0,
 		"delivered_by_supplier": item.delivered_by_supplier if args.get("doctype") in ["Sales Order", "Sales Invoice"] else 0,
-		"is_fixed_asset": item.is_fixed_asset
+		"is_fixed_asset": item.is_fixed_asset,
+		"weight_per_unit":item.weight_per_unit,
+		"weight_uom":item.weight_uom,
 	})
 
 	# calculate conversion factor