@spec custom_headers_example(String.t()) :: {:ok, ZenWebsocket.Client.t()}

Connection with custom headers example.

Shows how to connect with authorization headers and other custom headers.

@spec deribit_testnet_example() :: {:ok, ZenWebsocket.Client.t()}

Simple Deribit testnet connection example.

Connects to Deribit testnet, sends a public API request, and receives response. The default handler automatically sends messages to the calling process.