itsahedge

Add support for websocket rpc connections

2

As of version 2.0.2, the Go SDK does not support websocket rpc connections because in the [`getDefaultRpc()`](https://github.com/thirdweb-dev/go-sdk/blob/v2.0.2/thirdweb/sdk.go#L230) function, it checks: ```go if strings.HasPrefix(rpcUrlorName, "http") { return rpcUrlorName, nil } else...