add Azure Monitor service doc

src/content/docs/azure/services/monitor.mdx

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+---
+title: "Monitor"
+description: Get started with Azure Monitor on LocalStack
+template: doc
+---
+
+import AzureFeatureCoverage from "../../../../components/feature-coverage/AzureFeatureCoverage";
+
+## Introduction
+
+Azure Monitor is a platform service for collecting, analyzing, and acting on telemetry from Azure resources and applications.
+It helps you inspect activity logs and configure diagnostic settings for operational visibility.
+These capabilities are useful for troubleshooting, auditing, and observability workflows.
+
+LocalStack for Azure provides a local environment for building and testing applications that make use of Azure Monitor.
+The supported APIs are available on our [API Coverage section](#api-coverage), which provides information on the extent of Monitor's integration with LocalStack.
+
+## Getting started
+
+This guide is designed for users new to Azure Monitor and assumes basic knowledge of the Azure CLI and our `azlocal` wrapper script.
+
+Start your LocalStack container using your preferred method. For more information, see [Introduction to LocalStack for Azure](/azure/getting-started/).
+
+:::note
+As an alternative to using the `azlocal` CLI, users can run:
+
+`azlocal start-interception`
+
+This command points the `az` CLI away from the public Azure management REST API and toward the LocalStack for Azure emulator API.
+To revert this configuration, run:
+
+`azlocal stop-interception`
+
+This reconfigures the `az` CLI to send commands to the official Azure management REST API. At this time, there is no full parity between `azlocal` and `az` commands after running `az start-interception`. Therefore, this technique is not fully interchangeable.
+:::
+
+### Create a resource group
+
+Create a resource group to contain your Monitor demo resources:
+
+```bash
+azlocal group create \
+  --name rg-monitor-demo \
+  --location westeurope
+```
+
+```bash title="Output"
+{
+  "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg-monitor-demo",
+  "location": "westeurope",
+  "managedBy": null,
+  "name": "rg-monitor-demo",
+  "properties": {
+    "provisioningState": "Succeeded"
+  },
+  "tags": null,
+  "type": "Microsoft.Resources/resourceGroups"
+}
+```
+
+### Create a storage account
+
+Create a storage account to use as a diagnostic settings destination:
+
+```bash
+azlocal storage account create \
+  --name stmonitordoc79 \
+  --resource-group rg-monitor-demo \
+  --location westeurope \
+  --sku Standard_LRS
+```
+
+```bash title="Output"
+{
+  ...
+  "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg-monitor-demo/providers/Microsoft.Storage/storageAccounts/stmonitordoc79",
+  ...
+  "name": "stmonitordoc79",
+  ...
+  "primaryEndpoints": {
+    "blob": "https://stmonitordoc79blob.localhost.localstack.cloud:4566",
+    ...
+    "table": "https://stmonitordoc79table.localhost.localstack.cloud:4566",
+    ...
+  },
+  ...
+}
+```
+
+### List activity logs
+
+List recent activity logs from the subscription:
+
+```bash
+azlocal monitor activity-log list --max-events 5
+```
+
+```bash title="Output"
+[
+  {
+    "caller": "00000000-0000-0000-0000-000000000000",
+    "category": {
+      "value": "Administrative",
+      ...
+    },
+    "eventName": {
+      "value": "EndRequest",
+      ...
+    },
+    "eventTimestamp": "2026-03-17T07:34:43.230050",
+    "resourceGroupName": "rg-monitor-demo",
+    "resourceProviderName": {
+      "value": "Microsoft.Resources",
+      ...
+    },
+    ...
+  },
+  ...
+]
+```
+
+### Create and inspect diagnostic settings
+
+Get the resource group resource ID:
+
+```bash
+RESOURCE_ID=$(azlocal group show \
+  --name rg-monitor-demo \
+  --query id \
+  --output tsv)
+```
+
+Create diagnostic settings for the resource group:
+
+```bash
+azlocal monitor diagnostic-settings create \
+  --name rg-monitor-demo \
+  --resource "$RESOURCE_ID" \
+  --storage-account stmonitordoc79 \
+  --logs '[{"category":"Administrative","enabled":true}]'
+```
+
+```bash title="Output"
+{
+  "id": "subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg-monitor-demo/providers/microsoft.insights/diagnosticSettings/rg-monitor-demo",
+  "name": "rg-monitor-demo",
+  "logs": [
+    {
+      "category": "Administrative",
+      "enabled": true
+    }
+  ],
+  "metrics": [],
+  "storageAccountId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg-monitor-demo/providers/microsoft.Storage/storageAccounts/stmonitordoc79",
+  "type": "microsoft.insights/diagnosticSettings"
+}
+```
+
+Get the diagnostic setting:
+
+```bash
+azlocal monitor diagnostic-settings show \
+  --name rg-monitor-demo \
+  --resource "$RESOURCE_ID"
+```
+
+```bash title="Output"
+{
+  "id": "subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg-monitor-demo/providers/microsoft.insights/diagnosticSettings/rg-monitor-demo",
+  "name": "rg-monitor-demo",
+  "logs": [
+    {
+      "category": "Administrative",
+      "enabled": true
+    }
+  ],
+  "metrics": [],
+  ...
+}
+```
+
+### Update and delete diagnostic settings
+
+Update diagnostic settings to include an additional category:
+
+```bash
+azlocal monitor diagnostic-settings update \
+  --name rg-monitor-demo \
+  --resource "$RESOURCE_ID" \
+  --logs '[{"category":"Administrative","enabled":true},{"category":"Security","enabled":false}]'
+```
+
+```bash title="Output"
+{
+  "name": "rg-monitor-demo",
+  "logs": [
+    {
+      "category": "Administrative",
+      "enabled": true
+    },
+    {
+      "category": "Security",
+      "enabled": false
+    }
+  ],
+  ...
+}
+```
+
+Delete the diagnostic setting:
+
+```bash
+azlocal monitor diagnostic-settings delete \
+  --name rg-monitor-demo \
+  --resource "$RESOURCE_ID"
+```
+
+## API Coverage
+
+<AzureFeatureCoverage service="Microsoft.Insights" client:load />