Add optional attributes parameter to setImage

[weiningtry7]

Description

Hi! Thanks for the awesome library.

I noticed that setMention supports an optional attributes?: Record<string, string> parameter, which is super useful. However, setImage currently doesn't support this.

Use Case

I need to distinguish between different types of images in my application (e.g., distinguishing a standard user-uploaded image from a custom system sticker/emoji, or adding custom layout metadata like align: center).

Having an attributes parameter in setImage would allow us to pass custom metadata seamlessly.

Proposed API

setImage: (
  src: string, 
  width: number, 
  height: number, 
  attributes?: Record<string, string> // <-- Add this
) => void;