docs: add attachment option

Author: LeadcodeDev

src/content/docs/api/commands.mdx

@@ -187,7 +187,7 @@ final commandBuilder = CommandBuilder()
 
 Basic types are available to define options for your commands.
 
-:::code-group labels=[String, Integer, Double, Boolean]
+:::code-group labels=[String, Integer, Double, Boolean, Attachment]
 
 ```dart
 Option.string(
@@ -221,6 +221,14 @@ Option.boolean(
 );
 ```
 
+```dart
+Option.attachment(
+  name: 'attachment',
+  description: 'Your attachment',
+  required: true
+);
+```
+
 :::
 
 Mentionable types are available to define options for your commands.