fixup: Update to latest flake version and add k9s

Author: maru-ava

flake.lock

@@ -8,7 +8,7 @@
 
   # Flake inputs
   inputs = {
-    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.2405.*.tar.gz";
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.2411.*.tar.gz";
   };
 
   # Flake outputs
@@ -39,6 +39,7 @@
 
             # Kube tools
             kubectl                                    # Kubernetes CLI
+            k9s                                        # Kubernetes TUI
             kind                                       # Kubernetes-in-Docker
             kubernetes-helm                            # Helm CLI (Kubernetes package manager)
             self.packages.${system}.kind-with-registry # Script installing kind configured with a local registry