Add the DarkModeSwitcher component.

assets/js/app.js

@@ -26,11 +26,14 @@ import "flowbite/dist/flowbite.phoenix.js";
 import bidSort from "./bidSort";
 import authorRoleSort from "./authorRoleSort";
 
+import darkModeHook from "../vendor/dark_mode"
+let DarkThemeToggle = darkModeHook;
+
 let csrfToken = document.querySelector("meta[name='csrf-token']").getAttribute("content")
 let liveSocket = new LiveSocket("/live", Socket, {
   longPollFallbackMs: 2500,
   params: {_csrf_token: csrfToken},
-  hooks: { bidSort, authorRoleSort }
+  hooks: { bidSort, authorRoleSort, DarkThemeToggle }
 })
 
 // Show progress bar on live navigation and form submits