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/partials/verify.mjml

@@ -0,0 +1,12 @@
+<mj-section padding="0px">
+  <mj-column>
+    <mj-image src="{{.Props.SiteURL}}/static/images/welcome_illustration_new.png" width="320px" padding="0px" />
+  </mj-column>
+</mj-section>
+<mj-section padding="0px">
+  <mj-column>
+    <mj-text css-class="info" padding="0px">
+      {{.Props.Info}}<br>{{.Props.Info1}}
+    </mj-text>
+  </mj-column>
+</mj-section>