Refactor kubeconfig setup to use a temporary file and remove unnecessary directory creation

script/cd.sh

@@ -64,12 +64,9 @@ setup_kubeconfig() {
         return 0
     fi
     
-    # Create .kube directory if it doesn't exist
-    mkdir -p $HOME/.kube
-
     # Create temporary kubeconfig file from base64 encoded data
     echo "Decoding kubeconfig..."
-    echo "$KUBECONFIG_DATA" | base64 -d > $HOME/.kube/config
+    echo "$KUBECONFIG_DATA" | base64 -d > /tmp/kubeconfig
     
     # Set KUBECONFIG environment variable to use the temporary file
     export KUBECONFIG=/tmp/kubeconfig