Darkmode implemented

There is now a darkmode button

frontend/src/lib.rs

@@ -1,5 +1,6 @@
 mod auth;
 mod pages;
+mod dark_mode;
 use crate::auth::ProtectedRoute;
 use crate::pages::*;
 use gloo_net::http::Request;
@@ -271,6 +272,7 @@ fn switch(route: Route) -> Html {
 pub fn app() -> Html {
     html! {
         <BrowserRouter>
+            <dark_mode::DarkModeToggle />
             <Switch<Route> render={switch} />
         </BrowserRouter>
     }