Add shared song score aggregation support

gitadora@asphyxia/index.ts

@@ -40,12 +40,19 @@ export function register() {
 
   R.Config("shared_favorite_songs", {
     name: "Shared Favorite Songs (Experimental)",
-    desc: "If disabled, players will be able to keep separate lists of favorite songs for each version of Gitadora, as well as between Guitar Freaks and Drummania. " + 
+    desc: "If disabled, players will be able to keep separate lists of favorite songs for each version of Gitadora, as well as between Guitar Freaks and Drummania. " +
     "Enable this option to have a single unified list of favorite songs for both games, and across all versions. Default is false, to match original arcade behaviour.",
     type: "boolean",
     default: false,
   })
 
+  R.Config("shared_song_scores", {
+    name: "Shared Song Scores (Experimental)",
+    desc: "If disabled, players will keep separate scoreboards per version. Enable to merge best scores across all versions and games into a shared store.",
+    type: "boolean",
+    default: false,
+  })
+
   R.DataFile("data/mdb/custom.xml", {
     accept: ".xml",
     name: "Custom MDB",