Add openidconnect authentication demo (#1500)

* Add openidconnect authentication demo

* use_atom_ref usage to have a read/write handle on the atom

* Use default

* Code rewrite to better reflect the authentication flow

* Use the env macro instead of the build.rs to load env variables

* Add env variables

* Remove unnecessary dependency

* Add env variables to the root workspace

* Update readme

* Bump openidconnect version

* Use props to pass the client to the child components

* Code clean up

---------

Co-authored-by: Truong Tan Dat <truongt@igbmc.fr>

examples/openid_connect_demo/src/router.rs

@@ -0,0 +1,17 @@
+use crate::views::{header::AuthHeader, home::Home, login::Login, not_found::NotFound};
+use dioxus::prelude::*;
+use dioxus_router::prelude::*;
+
+#[derive(Routable, Clone)]
+pub enum Route {
+    #[layout(AuthHeader)]
+    #[route("/")]
+    Home {},
+
+    // https://dioxuslabs.com/learn/0.4/router/reference/routes#query-segments
+    #[route("/login?:query_string")]
+    Login { query_string: String },
+    #[end_layout]
+    #[route("/:..route")]
+    NotFound { route: Vec<String> },
+}