Add GlideRecord example to query active incidents README.md

Author: divyajetti9

Core ServiceNow APIs/GlideRecord/Query Active Incidents/README.md

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+# GlideRecord Example - Query Active Incidents
+
+**Purpose:**  
+Demonstrates how to use the `GlideRecord` API in a server-side script to query the **Incident** table for active records and print basic field values.
+
+---
+
+## Example Code
+
+```js
+var gr = new GlideRecord('incident');
+gr.addQuery('active', true);
+gr.orderByDesc('sys_created_on');
+gr.setLimit(10);
+gr.query();
+
+while (gr.next()) {
+  gs.info('Number: ' + gr.getValue('number') +
+          ', Short Description: ' + gr.getValue('short_description') +
+          ', Assigned To: ' + gr.getDisplayValue('assigned_to'));
+}
+
+var gr = new GlideRecord('incident');	Creates a new GlideRecord object for the Incident table
+gr.addQuery('active', true);	Filters only active incidents
+gr.orderByDesc('sys_created_on');	Orders results from newest to oldest
+gr.setLimit(10);	Limits the query to 10 records
+gr.query();	Executes the query
+while (gr.next())	Loops through each record found
+gs.info(...)	Prints information to system logs