add option to support extract original layer image for PIMG

src/types.rs

@@ -221,6 +221,8 @@ pub struct ExtraConfig {
     pub kirikiri_message_commands: std::sync::Arc<std::collections::HashSet<String>>,
     #[cfg(feature = "bgi-arc")]
     pub bgi_compress_file: bool,
+    #[cfg(feature = "kirikiri-img")]
+    pub kirikiri_pimg_overlay: Option<bool>,
 }
 
 #[derive(Clone, Copy, Debug, ValueEnum, PartialEq, Eq, PartialOrd, Ord)]