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/Dioxus.toml

@@ -0,0 +1,47 @@
+[application]
+
+# dioxus project name
+name = "OpenID Connect authentication demo"
+
+# default platfrom
+# you can also use `dioxus serve/build --platform XXX` to use other platform
+# value: web | desktop
+default_platform = "web"
+
+# Web `build` & `serve` dist path
+out_dir = "dist"
+
+# resource (static) file folder
+asset_dir = "public"
+
+[web.app]
+
+# HTML title tag content
+title = "OpenID Connect authentication demo"
+
+[web.watcher]
+
+index_on_404 = true
+
+watch_path = ["src"]
+
+# include `assets` in web platform
+[web.resource]
+
+# CSS style file
+style = []
+
+# Javascript code file
+script = []
+
+[web.resource.dev]
+
+# Javascript code file
+# serve: [dev-server] only
+script = []
+
+[application.plugins]
+
+available = true
+
+required = []