feat(cli): pause notifications (#13873)

cli/testdata/coder_--help.golden

@@ -27,6 +27,7 @@ SUBCOMMANDS:
     login             Authenticate with Coder deployment
     logout            Unauthenticate your local session
     netcheck          Print network debug information for DERP and STUN
+    notifications     Manage Coder notifications
     open              Open a workspace
     ping              Ping a workspace
     port-forward      Forward ports from a workspace to the local machine. For

cli/testdata/coder_notifications_--help.golden

@@ -0,0 +1,28 @@
+coder v0.0.0-devel
+
+USAGE:
+  coder notifications
+
+  Manage Coder notifications
+
+  Aliases: notification
+
+  Administrators can use these commands to change notification settings.
+    - Pause Coder notifications. Administrators can temporarily stop notifiers
+  from
+  dispatching messages in case of the target outage (for example: unavailable
+  SMTP
+  server or Webhook not responding).:
+  
+       $ coder notifications pause
+  
+    - Resume Coder notifications:
+  
+       $ coder notifications resume
+
+SUBCOMMANDS:
+    pause     Pause notifications
+    resume    Resume notifications
+
+———
+Run `coder --help` for a list of global options.

cli/testdata/coder_notifications_pause_--help.golden

@@ -0,0 +1,9 @@
+coder v0.0.0-devel
+
+USAGE:
+  coder notifications pause
+
+  Pause notifications
+
+———
+Run `coder --help` for a list of global options.

cli/testdata/coder_notifications_resume_--help.golden

@@ -0,0 +1,9 @@
+coder v0.0.0-devel
+
+USAGE:
+  coder notifications resume
+
+  Resume notifications
+
+———
+Run `coder --help` for a list of global options.