Add a standalone bracket display.

static/js/bracket_display.js

@@ -0,0 +1,18 @@
+// Copyright 2022 Team 254. All Rights Reserved.
+// Author: pat@patfairbank.com (Patrick Fairbank)
+//
+// Client-side methods for the bracket display.
+
+var websocket;
+
+// Handles a websocket message to populate the final score data, which also triggers a bracket update.
+const handleScorePosted = function(data) {
+  $("#bracketSvg").attr("src", "/api/bracket/svg?v=" + new Date().getTime());
+};
+
+$(function() {
+  // Set up the websocket back to the server.
+  websocket = new CheesyWebsocket("/displays/bracket/websocket", {
+    scorePosted: function(event) { handleScorePosted(event.data); },
+  });
+});