Restructure views

- Use Laravel's view namespacing rather than the full file path
- Organise views into directories

views/frontend/content.blade.php

@@ -0,0 +1,23 @@
+<div id="flarum-loading" style="display: none">
+  {{ $translator->trans('core.views.content.loading_text') }}
+</div>
+
+@if ($allowJs)
+  <noscript>
+    <div class="Alert">
+      <div class="container">
+        {{ $translator->trans('core.views.content.javascript_disabled_message') }}
+      </div>
+    </div>
+
+    {!! $content !!}
+  </noscript>
+@else
+  <div class="Alert Alert--error">
+    <div class="container">
+      {{ $translator->trans('core.views.content.load_error_message') }}
+    </div>
+  </div>
+
+  {!! $content !!}
+@endif