Make useWebsocketPublicClient return a WebSocket Public Client instead of Fallback

[arjun-io]

The WS Public Client (as opposed to the Fallback provider) supports eth_subscribe (see Viem issue here for the Fallback provider issue). The Fallback provider instead uses polling over the WS transport. Polling can be inefficient and results in higher usage in compute unit style infra providers like Alchemy.

A developer might expect the hook to return a websocket client that supports websocket methods like eth_subscribe instead of polling.