Move files in preparation for monorepo migration

apps/knossos/helpers/users.js

@@ -0,0 +1,9 @@
+export const getUserLink = (user) => {
+  return `/user/${user.username}`
+}
+
+export const isStaff = (user) => {
+  return user && STAFF_ROLES.includes(user.role)
+}
+
+export const STAFF_ROLES = ['moderator', 'admin']