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

* Initial commit

* weight adjustments

* Checkin changes.

(cherry picked from commit f5a3ac855d)

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

@@ -0,0 +1,24 @@
+---
+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: Edit message template
+weight: 100
+---
+
+# Edit a message template
+
+Message templates customize notification messages for the contact point types.
+
+To edit a message template
+
+1. In the Alerting page, click **Contact points** to open the page listing existing contact points.
+1. In the Template table, find the template you want to edit, then click the **Edit** (pen icon).
+1. Make your changes, then click **Save template**.