feat(attachments): add HasAttachments trait to manage attachment relationships

app/Domains/Attachable/Models/Concerns/HasAttachments.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Domains\Attachable\Models\Concerns;
+
+use App\Domains\Attachable\Models\Attachment;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\MorphMany;
+
+trait HasAttachments
+{
+    /**
+     * @return MorphMany<Attachment, Model>
+     */
+    public function attachments(): MorphMany
+    {
+        return $this->morphMany(Attachment::class, 'attachable');
+    }
+}