Implement PoC stream to test webpage via websocket

To get this off the ground, we should implement a basic client as a web-app. This will allow us to build out the transport layer without worrying about complexity of a real client app.

- We may need to solve how to encapsulate generic messages from the core system in any transport. How can they become serializable in any means? Chat with copilot.
- For example, core business logic has defined messages. Each transport may need more metadata or other messages in addition to the core messages. Should each transport define it's own duplicate set of messages? Or can they somehow wrap the existing core business logic messages? We also can't assume how each transport wants to serialize and de-serialize messages (if at all), meaning the core messages need to be serializable in any capacity. Is just implementing `serde` enough for that?
- *Probably yes for now*

The issue is about designing a transport layer for serializing core business logic messages. Start by examining the existing core message definitions and the serde crate usage. Look for any existing websocket or transport code. The goal is a PoC web-app client, so research how to set up a basic Rust websocket server and a simple web frontend to connect to it.

Scritto dal modello di indicizzazione a partire dal testo della issue.