Create README.md

Author: zakir8992

Client-Side Components/Client Scripts/Auto populate watchlist/README.md

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+# Assigned To Change – Watch List Update
+
+When the **Assigned To** field changes, this client script updates the **Watch list** to include the **Opened By**, **previous assignee**, and **new assignee**.  
+- Help maintains visibility of all users involved in the ticket’s ownership history.  
+- Helps track ownership transitions and ensures clarity during assignment change.  
+- A confirmation message appears when the change is reflected in the Watch list.  
+- Specific script for use in the Incident form in ServiceNow but can be used for other forms too