feat: websocket authentication now takes place in the websocket instead of using headers, for broader API compatibility

eg Javascript WebSocket API

src/utils/events.rs

@@ -12,6 +12,7 @@ pub enum Event {
 #[derive(Clone, Debug)]
 pub enum WebsocketMessage {
     NewOwner(Arc<owner::Model>),
+    Error(String),
     Ping
 }
 
@@ -20,10 +21,12 @@ impl WebsocketMessage {
         json!({
             "type": match self {
                 Self::NewOwner(_) => "new_owner",
+                Self::Error(_) => "error",
                 Self::Ping => "ping",
             },
             "data": match self {
                 Self::NewOwner(owner) => json!(owner),
+                Self::Error(error) => json!(error),
                 Self::Ping => json!(null),
             }
         })