Add limactl save

```console
$ limactl save --help
Save an instance

Usage:
  limactl save INSTANCE [flags]

Flags:
  -h, --help   help for save

Global Flags:
      --debug               debug mode
      --log-format string   Set the logging format [text, json] (default "text")
      --log-level string    Set the logging level [trace, debug, info, warn, error]
      --tty                 Enable TUI interactions such as opening an editor. Defaults to true when stdout is a terminal. Set to false for automation. (default true)
```

Signed-off-by: Norio Nomura <[email protected]>

Author: norio-nomura

cmd/limactl/main.go

@@ -155,6 +155,7 @@ func newApp() *cobra.Command {
 		newProtectCommand(),
 		newUnprotectCommand(),
 		newTunnelCommand(),
+		newSaveCommand(),
 	)
 	if runtime.GOOS == "darwin" || runtime.GOOS == "linux" {
 		rootCmd.AddCommand(startAtLoginCommand())

cmd/limactl/save.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"github.com/lima-vm/lima/pkg/instance"
+	networks "github.com/lima-vm/lima/pkg/networks/reconcile"
+	"github.com/lima-vm/lima/pkg/store"
+	"github.com/spf13/cobra"
+)
+
+func newSaveCommand() *cobra.Command {
+	saveCmd := &cobra.Command{
+		Use:               "save INSTANCE",
+		Short:             "Save an instance",
+		Args:              WrapArgsError(cobra.MaximumNArgs(1)),
+		RunE:              saveAction,
+		ValidArgsFunction: saveBashComplete,
+		GroupID:           basicCommand,
+	}
+
+	return saveCmd
+}
+
+func saveAction(cmd *cobra.Command, args []string) error {
+	instName := DefaultInstanceName
+	if len(args) > 0 {
+		instName = args[0]
+	}
+
+	inst, err := store.Inspect(instName)
+	if err != nil {
+		return err
+	}
+
+	if err != nil {
+		return err
+	}
+	err = instance.StopGracefully(inst, true)
+	// TODO: should we also reconcile networks if graceful save returned an error?
+	if err == nil {
+		err = networks.Reconcile(cmd.Context(), "")
+	}
+	return err
+}
+
+func saveBashComplete(cmd *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+	return bashCompleteInstanceNames(cmd)
+}