Function blend_images_js

pub async fn blend_images_js(
    bot: File,
    top: File,
    target_file_name: String,
    algorithm: Option<String>,
    is_inline: Option<bool>,
    options: JsValue,
) -> Result<File, JsValue>

Blends two Files into one, named target_file_name, using algorithm and the extra options given. Algorithm defaults to BlendAlgorithm::Multiplicative.