feat: added supplier item group doctype

erpnext/buying/doctype/supplier_item_group/supplier_item_group.js

@@ -0,0 +1,8 @@
+// Copyright (c) 2021, Frappe Technologies Pvt. Ltd. and contributors
+// For license information, please see license.txt
+
+frappe.ui.form.on('Supplier Item Group', {
+	// refresh: function(frm) {
+
+	// }
+});

erpnext/buying/doctype/supplier_item_group/supplier_item_group.json

@@ -0,0 +1,51 @@
+{
+ "actions": [],
+ "creation": "2021-05-07 18:16:40.621421",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "supplier",
+  "item_group"
+ ],
+ "fields": [
+  {
+   "fieldname": "supplier",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Supplier",
+   "options": "Supplier"
+  },
+  {
+   "fieldname": "item_group",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Item Group",
+   "options": "Item Group"
+  }
+ ],
+ "index_web_pages_for_search": 1,
+ "links": [],
+ "modified": "2021-05-07 18:16:40.621421",
+ "modified_by": "Administrator",
+ "module": "Buying",
+ "name": "Supplier Item Group",
+ "owner": "Administrator",
+ "permissions": [
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "System Manager",
+   "share": 1,
+   "write": 1
+  }
+ ],
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "track_changes": 1
+}

erpnext/buying/doctype/supplier_item_group/supplier_item_group.py

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2021, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+from __future__ import unicode_literals
+# import frappe
+from frappe.model.document import Document
+
+class SupplierItemGroup(Document):
+	pass

erpnext/buying/doctype/supplier_item_group/test_supplier_item_group.py

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2021, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+from __future__ import unicode_literals
+
+# import frappe
+import unittest
+
+class TestSupplierItemGroup(unittest.TestCase):
+	pass