fix: simplify wallet choices and use bnb chain

src/wallet/RainbowWalletProvider.tsx

@@ -13,7 +13,7 @@ import {
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { useState, type ReactNode } from "react";
 import { http, createConfig, WagmiProvider } from "wagmi";
-import { mainnet } from "wagmi/chains";
+import { bsc } from "wagmi/chains";
 
 const projectId =
   import.meta.env.VITE_WALLETCONNECT_PROJECT_ID || "ark-library-dev-only";
@@ -32,11 +32,11 @@ const connectors = connectorsForWallets(
 );
 
 export const wagmiConfig = createConfig({
-  chains: [mainnet],
+  chains: [bsc],
   connectors,
   ssr: false,
   transports: {
-    [mainnet.id]: http(),
+    [bsc.id]: http(),
   },
 });