Serialize node links instead of widget values

Syncing litegraph widget state is kinda annoying, and unnecessary since
everything will be moved to separate UI component nodes. Instead I
modified the input slot type to store the min/max/step to be copied into
the default UI node later. Now nothing uses litegraph's widgets anymore

src/lib/components/ComfyApp.svelte

@@ -110,10 +110,10 @@
      app.eventBus.on("configured", nodeState.configureFinished);
      app.eventBus.on("cleared", nodeState.clear);
 
-     app.eventBus.on("nodeAdded", layoutState.nodeAdded);
-     app.eventBus.on("nodeRemoved", layoutState.nodeRemoved);
-     app.eventBus.on("configured", layoutState.configureFinished);
-     app.eventBus.on("cleared", layoutState.clear);
+     // app.eventBus.on("nodeAdded", layoutState.nodeAdded);
+     // app.eventBus.on("nodeRemoved", layoutState.nodeRemoved);
+     // app.eventBus.on("configured", layoutState.configureFinished);
+     // app.eventBus.on("cleared", layoutState.clear);
 
      app.eventBus.on("autosave", doAutosave);
      app.eventBus.on("restored", doRestore);