UserDetail - placeholder for permission picker 🔒

ref #12

src/components/UserDetail.svelte

@@ -177,6 +177,12 @@
         name="email"
         class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm rounded-l-md sm:text-sm border-gray-300 border bg-gray-50 text-gray-500 dark:bg-gray-900 dark:text-gray-100 rounded-md p-2" />
     </div>
+    <div class="text-sm w-full">
+      <span class="font-medium">Permissions</span>
+      <div class="border-4 border-dashed rounded h-96 mb-4 p-5 text-lg text-center">
+        TODO: permission picker 🔒
+      </div>
+    </div>
   </section>
 {:catch error}
   <PromiseError {error} />