fix: preserve _preScored from plugin items to allow ordering control (#1696)

The _preScored property allows plugins to control the ordering of
launcher results. Previously, this property was being overwritten
with undefined during item transformation, preventing plugins from
controlling which items appear first.

This change preserves the _preScored value from plugin items in:
- transformBuiltInLauncherItem()
- transformPluginItem()

Required for: devnullvoid/dms-web-search#7

quickshell/Modals/DankLauncherV2/ItemTransformers.js

@@ -112,7 +112,7 @@ function transformBuiltInLauncherItem(item, pluginId, openLabel) {
         _hName: "",
         _hSub: "",
         _hRich: false,
-        _preScored: undefined
+        _preScored: item._preScored
     };
 }
 
@@ -186,7 +186,7 @@ function transformPluginItem(item, pluginId, selectLabel) {
         _hName: "",
         _hSub: "",
         _hRich: false,
-        _preScored: undefined
+        _preScored: item._preScored
     };
 }