♻️ (connection_details.rs): Refactor ConnectionDetails to use Option for optional fields
♻️ (connection_details.rs): Change new constructor to accept &str and convert to String
✨ (connection_details.rs): Implement Debug trait for ConnectionDetails
♻️ (connection_options.rs): Implement Debug trait for ConnectionOptions
♻️ (lightstreamer_client.rs): Refactor LightstreamerClient to use Option for server_address and adapter_set
✨ (lightstreamer_client.rs): Implement Debug trait for LightstreamerClient
♻️ (main.rs): Update subscribe_to_channel function to use new control.txt URL and parameters
♻️ (main.rs): Update main function to use Option<&str> when creating LightstreamerClient
✨ (proxy.rs): Add Proxy struct and ProxyType enum to handle proxy configurations
