feat: add basic example

examples/react-tanstack-router/src/routes/index.tsx

@@ -0,0 +1,40 @@
+import { createFileRoute } from '@tanstack/react-router';
+import { useObservableEagerState } from 'observable-hooks';
+import { useOidcClient } from 'oidc-client-rx/adapters/react';
+import { useCallback } from 'react';
+
+export const Route = createFileRoute('/')({
+  component: HomeComponent,
+});
+
+function HomeComponent() {
+  const { oidcSecurityService } = useOidcClient();
+
+  const { isAuthenticated } = useObservableEagerState(
+    oidcSecurityService.isAuthenticated$
+  );
+
+  const handleLogin = useCallback(() => {
+    oidcSecurityService.authorize().subscribe();
+  }, [oidcSecurityService]);
+
+  const handleLogout = useCallback(() => {
+    oidcSecurityService.logoff().subscribe();
+  }, [oidcSecurityService]);
+
+  return (
+    <div className="p-2 text-center">
+      <h1>Welcome OIDC-CLIENT-RX DEMO of react-tanstack-router</h1>
+      <p>Is authenticated? {isAuthenticated ? 'True' : 'False'}</p>
+      {isAuthenticated ? (
+        <button onClick={handleLogout} type="button">
+          Click to Logout
+        </button>
+      ) : (
+        <button onClick={handleLogin} type="button">
+          Click to Login
+        </button>
+      )}
+    </div>
+  );
+}