CHORE(merge): merge from develop

- Initial setup and all features from develop branch
- Includes: auth, deploy, docker, style fixes
- K3S deployment configuration

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

@@ -0,0 +1,4 @@
+import { handlers } from "@/lib/auth";
+
+export const { GET, POST } = handlers;
+