Dummy client to learn the other half of WebSockets

This is mostly a copy of ambiso/bevy_websocket_example:
https://github.com/ambiso/bevy_websocket_example/tree/main

It demonstrates how to hold and use a (Tungstenite) WebSocket in a Bevy
app. I've altered it slightly (and skipped impl'ing the send function)
to fit my own chatroom dummy target.

This is completely useless as a chatroom app, but it's not supposed to
be one. Now I can move on to building the actual Pong game!

Cargo.toml

@@ -1,3 +1,9 @@
 [workspace]
 members = ["client", "server"]
 resolver = "3"
+
+[profile.dev]
+opt-level = 1
+
+[profile.dev.package."*"]
+opt-level = 3