feat: Create 'Stock Item' child table

erpnext/assets/doctype/stock_item/stock_item.json

@@ -0,0 +1,55 @@
+{
+ "actions": [],
+ "creation": "2021-05-12 02:41:54.161024",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "item",
+  "valuation_rate",
+  "consumed_quantity",
+  "total_value"
+ ],
+ "fields": [
+  {
+   "fieldname": "item",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Item",
+   "options": "Item"
+  },
+  {
+   "fetch_from": "item.valuation_rate",
+   "fieldname": "valuation_rate",
+   "fieldtype": "Currency",
+   "in_list_view": 1,
+   "label": "Valuation Rate",
+   "read_only": 1
+  },
+  {
+   "fieldname": "consumed_quantity",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Consumed Quantity"
+  },
+  {
+   "fieldname": "total_value",
+   "fieldtype": "Currency",
+   "in_list_view": 1,
+   "label": "Total Value",
+   "read_only": 1
+  }
+ ],
+ "index_web_pages_for_search": 1,
+ "istable": 1,
+ "links": [],
+ "modified": "2021-05-12 03:19:55.006300",
+ "modified_by": "Administrator",
+ "module": "Assets",
+ "name": "Stock Item",
+ "owner": "Administrator",
+ "permissions": [],
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "track_changes": 1
+}

erpnext/assets/doctype/stock_item/stock_item.py

@@ -0,0 +1,8 @@
+# Copyright (c) 2021, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+# import frappe
+from frappe.model.document import Document
+
+class StockItem(Document):
+	pass