feat: implement product and attachment management service with supporting migrations and API controllers

app/Domains/Catalog/Models/Product.php

@@ -2,6 +2,7 @@
 
 namespace App\Domains\Catalog\Models;
 
+use App\Domains\Attachable\Models\Attachment;
 use App\Domains\Tenant\Models\Tenant;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
@@ -61,6 +62,19 @@ class Product extends Model
         )->withTimestamps();
     }
 
+    /**
+     * @return BelongsToMany<Attachment, $this>
+     */
+    public function attachments(): BelongsToMany
+    {
+        return $this->belongsToMany(
+            Attachment::class,
+            'productos_attachments',
+            'producto_id',
+            'attachment_id'
+        )->withTimestamps();
+    }
+
     /**
      * Create a variant for this product with its definitions.
      *