feat(frontend): added frontend

- Router: client side route handling with client side rendering
- Toast: rought Toast handling for better UX and messaging
- Auth: single point of truth for the Logged in user

This commit doesnt not include the openapi generated code

frontend/src/pages/chat/chat.ts

@@ -0,0 +1,5 @@
+import { addRoute, type RouteHandlerParams } from "@app/routing";
+
+addRoute('/chat', function (_url: string, _args: RouteHandlerParams) {
+	return "this is the chat page !"
+})