feat: oidc-client.js based Svelte OidcComponent

follows a pattern similar to @dopry/svelte-auth0,
but uses the more standards compliant oidc-client.js
library.

src/main.js

@@ -0,0 +1,8 @@
+import App from './App.svelte';
+
+const app = new App({
+	target: document.body,
+	props: {},
+});
+
+export default app;