feat: add proxy_url support to Conversation class

[8thgencore]

• Added proxy_url as an optional parameter to the Conversation class.
• Updated the _run method to utilize the proxy_url when establishing a WebSocket connection.

This enhancement allows for better network configuration options during conversational AI sessions.

[AngeloGiacco]

what's the reason for this change ?

[8thgencore]

what's the reason for this change ?

The reason for this change is to provide greater flexibility in network configurations when using the Conversation class. By adding proxy_url as an optional parameter, users can now route WebSocket connections through a proxy server if needed. This is particularly useful in environments with restricted direct internet access, such as corporate networks or certain cloud setups.