Add Livewire comment system

app/Models/Presenters/CommentPresenter.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models\Presenters;
+
+use App\Models\Comment;
+use Illuminate\Support\Str;
+
+class CommentPresenter
+{
+    public $comment;
+
+    public function __construct(Comment $comment)
+    {
+        $this->comment = $comment;
+    }
+
+    public function markdownBody()
+    {
+        return Str::of($this->comment->body)->markdown([
+            'html_input' => 'strip',
+        ]);
+    }
+
+    public function relativeCreatedAt()
+    {
+        return $this->comment->created_at->diffForHumans();
+    }
+}