Comments: Started archive display, created mode for tree node

app/Activity/Tools/CommentTreeNode.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace BookStack\Activity\Tools;
+
+use BookStack\Activity\Models\Comment;
+
+class CommentTreeNode
+{
+    public Comment $comment;
+    public int $depth;
+
+    /**
+     * @var CommentTreeNode[]
+     */
+    public array $children;
+
+    public function __construct(Comment $comment, int $depth, array $children)
+    {
+        $this->comment = $comment;
+        $this->depth = $depth;
+        $this->children = $children;
+    }
+}