feat: migrate to golang

internal/cli/core.go

@@ -0,0 +1,33 @@
+package cli
+
+import "github.com/spf13/cobra"
+
+func newCoreCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "core",
+		Short: "Manage scientific-surfing core components",
+	}
+	cmd.AddCommand(newCoreUpdateCmd())
+	return cmd
+}
+
+func newCoreUpdateCmd() *cobra.Command {
+	var version string
+	var force bool
+	c := &cobra.Command{
+		Use:   "update",
+		Short: "Update scientific-surfing core components",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			m, err := newManagers("", "", "")
+			if err != nil {
+				return err
+			}
+			m.Core.Update(version, force)
+			return nil
+		},
+	}
+	c.Flags().StringVar(&version, "version", "", "Specific version to download (e.g., v1.18.5). If not specified, downloads latest")
+	c.Flags().BoolVar(&force, "force", false, "Force update even if binary already exists")
+	return c
+}