refactor(#35): Migrate realtime server to PartyKit and update client socket flow

src/server/party/index.ts

@@ -0,0 +1,31 @@
+import type * as Party from "partykit/server";
+
+export default class Server implements Party.Server {
+  constructor(readonly room: Party.Room) {}
+
+  onConnect(conn: Party.Connection, ctx: Party.ConnectionContext) {
+    // A websocket just connected!
+    console.log(
+      `Connected:
+  id: ${conn.id}
+  room: ${this.room.id}
+  url: ${new URL(ctx.request.url).pathname}`
+    );
+
+    // let's send a message to the connection
+    conn.send("hello from server");
+  }
+
+  onMessage(message: string, sender: Party.Connection) {
+    // let's log the message
+    console.log(`connection ${sender.id} sent message: ${message}`);
+    // as well as broadcast it to all the other connections in the room...
+    this.room.broadcast(
+      `${sender.id}: ${message}`,
+      // ...except for the connection it came from
+      [sender.id]
+    );
+  }
+}
+
+Server satisfies Party.Worker;