Build very rough HTML-only content

And redirect to the "no JS" mode if the JS app crashes on boot.

ClientView/ClientAction is all a bit of a mess and will need to be
radically cleaned up at some point...

framework/core/views/index.blade.php

@@ -1 +1,21 @@
-index SEO content
+<?php
+$url = app('Flarum\Http\UrlGeneratorInterface');
+?>
+<div class="container">
+    <h2>All Discussions</h2>
+
+    <ul>
+        @foreach ($document->data as $discussion)
+            <li>
+                <a href="{{ $url->toRoute('flarum.forum.discussion', [
+                    'id' => $discussion->id,
+                    'slug' => $discussion->attributes->title
+                ]) }}">
+                    {{ $discussion->attributes->title }}
+                </a>
+            </li>
+        @endforeach
+    </ul>
+
+    <a href="{{ $url->toRoute('flarum.forum.index') }}?page={{ $page + 1 }}">Next Page &raquo;</a>
+</div>