added permission for blogPost edit

app/Policies/BlogPostPolicy.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Policies;
+
+use App\Models\User;
+use App\Models\BlogPost;
+
+class BlogPostPolicy
+{
+    public function edit(User $user, BlogPost $blogPost): bool
+    {
+        return $this->isAuthorPlan($user, $blogPost) || $user->hasRole('admin') || $user->hasRole('moderator');
+    }
+
+    private function isAuthorPlan(User $user, BlogPost $blogPost): bool
+    {
+        return $user->id === $blogPost->author()->first()->id;
+    }
+}