add readNotifications route and bruno's request

tests/Notifications/Read notifications.bru

@@ -0,0 +1,15 @@
+meta {
+  name: Read notifications
+  type: http
+  seq: 3
+}
+
+post {
+  url: {{url}}/api/users/notifications/read
+  body: none
+  auth: inherit
+}
+
+settings {
+  encodeUrl: true
+}