Docs: Refactor contact points section of alerting docs (#49758)

* Initial commit

* weight adjustments

* Checkin changes.

docs/sources/alerting/contact-points/message-templating/create-message-template.md

@@ -0,0 +1,32 @@
+---
+aliases:
+  - /docs/grafana/latest/alerting/contact-points/message-templating/
+  - /docs/grafana/latest/alerting/message-templating/
+  - /docs/grafana/latest/alerting/unified-alerting/message-templating/
+keywords:
+  - grafana
+  - alerting
+  - guide
+  - contact point
+  - templating
+title: Create message template
+weight: 100
+---
+
+# Create a message template
+
+You can use message templates to customize notification messages for the contact point types.
+
+To create a message tempplate:
+
+1. In the Grafana menu, click the **Alerting** (bell) icon to open the Alerting page listing existing alerts.
+2. In the Alerting page, click **Contact points** to open the page listing existing contact points.
+3. From Alertmanager drop-down, select an external Alertmanager to create and manage templates for the external data source. Otherwise, keep the default option of Grafana.
+   {{< figure max-width="250px" src="/static/img/docs/alerting/unified/contact-points-select-am-8-0.gif" caption="Select Alertmanager" >}}
+4. Click **Add template**.
+5. In **Name**, add a descriptive name.
+6. In **Content**, add the content of the template.
+7. Click **Save template** button at the bottom of the page.
+   <img  src="/static/img/docs/alerting/unified/templates-create-8-0.png" width="600px">
+
+The `define` tag in the Content section assigns the template name. This tag is optional, and when omitted, the template name is derived from the **Name** field. When both are specified, it is a best practice to ensure that they are the same.