feat(attachment): implement deletion of cropped attachments alongside original and update README

tests/Feature/Attachable/AttachmentTest.php

@@ -140,6 +140,25 @@ class AttachmentTest extends TestCase
         }
     }
 
+    public function test_it_deletes_the_crop_together_with_its_original(): void
+    {
+        Storage::fake('s3');
+
+        $original = app(AttachmentService::class)->storeCroppedImage(
+            UploadedFile::fake()->image('product.png'),
+            'attachments/acme',
+            10,
+            10,
+        );
+        $cropped = $original->croppedAttachment;
+
+        app(AttachmentService::class)->delete($original);
+
+        $this->assertDatabaseCount('attachments', 0);
+        Storage::disk('s3')->assertMissing($original->path);
+        Storage::disk('s3')->assertMissing($cropped->path);
+    }
+
     public function test_it_deletes_from_s3_before_removing_the_database_record(): void
     {
         Storage::fake('s3');