Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/templates/email_footer.html

@@ -0,0 +1,10 @@
+{{define "email_footer"}}
+
+<td style="text-align: center;color: #AAA; font-size: 11px; padding-bottom: 10px;">
+    <p style="padding: 0 50px;">
+        {{.Props.Organization}}<br>
+        {{.Props.Footer}}
+    </p>
+</td>
+
+{{end}}