feat: added quick grafana doc

docs/tutorials/observability.md

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+# Integrating Observability with K8sGPT
+
+Enhance your Kubernetes observability by integrating Prometheus and Grafana with K8sGPT. Follow these steps to set up and visualize your cluster's insights:
+## Prerequisites
+- Prometheus: Install using Helm via Prometheus Community Helm Charts.
+- Grafana Dashboard: Ensure Grafana is installed and accessible in your environment.
+
+# Installation Steps
+
+Install the K8sGPT Operator with observability features enabled:
+```
+helm install release k8sgpt/k8sgpt-operator -n k8sgpt-operator-system --create-namespace --set interplex.enabled=true --set grafanaDashboard.enabled=true --set serviceMonitor.enabled=true
+```
+This command:
+- Creates a ServiceMonitor to integrate with Prometheus.
+- Automatically configures and populates data into your Grafana dashboard.
+
+Once set up, you can explore key metrics like:
+- Results identified by K8sGPT.
+- Operator workload details, providing insight into resource usage and efficiency.
+
+
+_See example of a K8sGPT Grafana dashboard_
+
+![Generate a token on the OpenAI website](../imgs/grafana.png)