Add disconnect functionality to App component

- Introduced a disconnect button that removes the wallet from localStorage and reloads the page when clicked.
- Updated the rendering logic to conditionally display the connect and disconnect buttons based on the connection state.

example/src/App.tsx

@@ -22,11 +22,15 @@ function App() {
     }
   }
 
-
+  const disconnect = async () => {
+    localStorage.removeItem('VARAN_WALLET');
+    window.location.reload();
+  }
 
   return (
     <div style={{ display: 'flex', flexDirection: 'column', gap: '10px' }}>
-      <button onClick={connect}>Connect</button>
+      {isConnected && <button onClick={disconnect}>Disconnect</button>}
+      {!isConnected && <button onClick={connect}>Connect</button>}
       <div>Is Connected: {isConnected ? 'Yes' : 'No'}</div>
       <button onClick={checkData}>Check Data</button>
       <div>DATA</div>