Add local network option to Swap network selector

Author: mise42

demo/components/NetworkSelector.tsx

@@ -14,6 +14,10 @@ import { useAtom } from "jotai";
 import { useCallback, useState } from "react";
 
 const NETWORKS = [
+  {
+    name: "Local",
+    endpoint: "ws://127.0.0.1:8000",
+  },
   {
     name: "Acala",
     endpoint: "wss://pvq-mandala.aca-staging.network",