feat: Add API to check all table rows

frappe/public/js/frappe/form/controls/table.js

@@ -102,5 +102,8 @@ frappe.ui.form.ControlTable = frappe.ui.form.Control.extend({
 	},
 	validate: function() {
 		return this.get_value();
+	},
+	check_all_rows() {
+		this.$wrapper.find('.grid-row-check')[0].click();
 	}
 });