Add support to old pimg file which don't have diff_id (example game: サノバウィッチ evimage)

src/types.rs

@@ -649,6 +649,10 @@ pub struct ExtraConfig {
     /// Force decrypt files in Kirikiri xp3 archive even when flags are not set.
     /// Some encrypted files in Kirikiri XP3 archive may not set encryption flag, but still encrypted. Enable this to force decrypt these files.
     pub xp3_force_decrypt: bool,
+    #[cfg(feature = "emote-img")]
+    /// Disable diff handle when exporting Emote PIMG images to PSD files.
+    /// If enabled, no group layers will be crated if both layer don't have diff_id and group_layer_id attribute.
+    pub emote_pimg_psd_no_diff: bool,
 }
 
 #[cfg(feature = "artemis")]