[MM-33198] - Portal: Send admin welcome email after the installation is complete (#17043)

* [MM-33198] - Portal: Send admin welcome email after the installation is complete

* Send cloud welcome email

* Feedback impl-2

* Fix template

* Temp undo

* Update

* make i18n-extract

* Translations

* Feedback impl-3

* More template fixes

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

i18n/en.json

@@ -479,6 +479,10 @@
     "id": "api.cloud.app_error",
     "translation": "Internal error during cloud api request."
   },
+  {
+    "id": "api.cloud.cws_webhook_event_missing_error",
+    "translation": "Webhook event was not handled. Either it is missing or it is not valid."
+  },
   {
     "id": "api.cloud.get_admins_emails.error",
     "translation": "Error getting system admins email."
@@ -2678,6 +2682,74 @@
     "id": "api.templates.at_limit_title",
     "translation": "You’ve reached the user limit for the free tier "
   },
+  {
+    "id": "api.templates.cloud_welcome_email.add_apps_info",
+    "translation": "Add apps to your workspace"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.add_apps_sub_info",
+    "translation": "Streamline your work with tools like Github, Google Calendar and Chrome. Explore all of the integrations we have on our"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.app_market_place",
+    "translation": "app marketplace."
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.button",
+    "translation": "Open Mattermost"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.download_mm_info",
+    "translation": "Download the Mattermost App"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.info",
+    "translation": "Thanks for creating "
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.info2",
+    "translation": "Make sure to save or bookmark your link for future use."
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.invite_info",
+    "translation": "Invite people to your workspace"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.invite_sub_info",
+    "translation": "Share this link to invite your members to join {{.WorkSpace}}:"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.mm_apps",
+    "translation": "mobile and desktop apps"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.signin_sub_info",
+    "translation": "Sign into your workspace on our"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.signin_sub_info2",
+    "translation": "for the best experience on PC, Mac, iOS and Android."
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.start_questions",
+    "translation": "Having questions about getting started? Email us at"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.subject",
+    "translation": "Congratulations!"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.subtitle",
+    "translation": "Set up your workspace"
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.subtitle_info",
+    "translation": "Take the following steps to build out your teams and get the most out of your workspace."
+  },
+  {
+    "id": "api.templates.cloud_welcome_email.title",
+    "translation": "Congratulations - your {{.WorkSpace}} workspace is ready to go!"
+  },
   {
     "id": "api.templates.copyright",
     "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
@@ -3546,6 +3618,10 @@
     "id": "api.user.saml.not_available.app_error",
     "translation": "SAML 2.0 is not configured or supported on this server."
   },
+  {
+    "id": "api.user.send_cloud_welcome_email.error",
+    "translation": "Failed to send cloud welcome email"
+  },
   {
     "id": "api.user.send_deactivate_email_and_forget.failed.error",
     "translation": "Failed to send the deactivate account email successfully"