doc: add a guess for the states of the notifications

web-push.md

@@ -390,3 +390,13 @@ While notifications are turned on, the user can tap on the App Notifications tog
 
 - "Turn off Notifications" to fully turn them off (which means the user will need to go through the dialogs agains to turn them back on).
 - "Leave it On" to make no changes and dismiss the dialog.
+
+# NOTIFICATION STATES
+
+* Unpermissioned. Push server cannot send notifications to the user because it does not have permission.
+  This may be the same as when the user gave permission in the past but has since revoked it at the OS or browser
+  level, outside the app. (User can change to Permissioned when the user gives permission.)
+* Permissioned. (User can change to Unpermissioned via the OS or browser settings.)
+  * Active. (User can change to Muted when the user mutes notifications.)
+  * Muted. (User can change to Active when the user toggles it.)
+    (Turning mute off automatically after some amount of time is not planned in version 1.)