refactor: migrate from @hey-api/openapi-ts to openapi-react-query

- Replace @hey-api/openapi-ts with openapi-typescript and openapi-react-query
- Generate TypeScript types from OpenAPI spec
- Set up React Query infrastructure with QueryClientProvider
- Migrate all API hooks to use React Query patterns
- Maintain backward compatibility for existing components
- Remove old API infrastructure and dependencies

www/app/api/auth/[...nextauth]/route.ts

@@ -1,9 +0,0 @@
-// NextAuth route handler for Authentik
-// Refresh rotation has been taken from https://next-auth.js.org/v3/tutorials/refresh-token-rotation even if we are using 4.x
-
-import NextAuth from "next-auth";
-import { authOptions } from "../../../lib/auth";
-
-const handler = NextAuth(authOptions);
-
-export { handler as GET, handler as POST };