Create netdata-assistant docs (#15438)

Co-authored-by: Fotis Voutsas <fotis@netdata.cloud>
Co-authored-by: Andrew Maguire <andrewm4894@gmail.com>

docs/cloud/netdata-assistant.md

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+# Alert troubleshooting with Netdata Assistant
+
+The Netdata Assistant is a feature that uses large language models and the Netdata community's collective knowledge to guide you during troubleshooting. It is designed to make understanding and root causing alerts simpler and faster.
+
+## Using Netdata Assistant
+
+- Navigate to the alerts tab
+- If there are active alerts, the `Actions` column will have an Assistant button
+
+  ![](https://github-production-user-asset-6210df.s3.amazonaws.com/24860547/253559075-815ca123-e2b6-4d44-a780-eeee64cca420.png)
+
+- Clicking on the Assistant button opens up as a floating window with customized information and troubleshooting tips for this alert (note that the window can follow you through your troubleshooting journey on Netdata dashboards)
+
+  ![](https://github-production-user-asset-6210df.s3.amazonaws.com/24860547/253559645-62850c7b-cd1d-45f2-b2dd-474ecbf2b713.png)
+
+- In case you need more information, or want to understand deeper, Netdata Assistant also provides useful web links to resources that can help. 
+
+  ![](https://github-production-user-asset-6210df.s3.amazonaws.com/24860547/253560071-e768fa6d-6c9a-4504-bb1f-17d5f4707627.png)
+
+- If there are no active alerts, you can still use Netdata Assistant by clicking the Assistant button on the Alert Configuration view.