feat: provision to add items in Stock Reservation dialog (backport #38558) (#38920)

* feat: provision to update items in Stock Reservation dialog

(cherry picked from commit 9471d8fff9)

* fix(ux): show row index and field label while selecting the Sales Order Item

(cherry picked from commit 00261094c8)

* feat: provision to add items in Stock Reservation dialog

(cherry picked from commit 8d5045ef4c)

---------

Co-authored-by: s-aga-r <sagarsharma.s312@gmail.com>

erpnext/controllers/queries.py

@@ -891,3 +891,31 @@ def get_payment_terms_for_references(doctype, txt, searchfield, start, page_len,
 			as_list=1,
 		)
 	return terms
+
+
+@frappe.whitelist()
+@frappe.validate_and_sanitize_search_inputs
+def get_filtered_child_rows(doctype, txt, searchfield, start, page_len, filters) -> list:
+	table = frappe.qb.DocType(doctype)
+	query = (
+		frappe.qb.from_(table)
+		.select(
+			table.name,
+			Concat("#", table.idx, ", ", table.item_code),
+		)
+		.orderby(table.idx)
+		.offset(start)
+		.limit(page_len)
+	)
+
+	if filters:
+		for field, value in filters.items():
+			query = query.where(table[field] == value)
+
+	if txt:
+		txt += "%"
+		query = query.where(
+			((table.idx.like(txt.replace("#", ""))) | (table.item_code.like(txt))) | (table.name.like(txt))
+		)
+
+	return query.run(as_dict=False)