[#1381] neofs-cli: Move JSON and verbose printing to a common package

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-cli/internal/common/json.go

@@ -0,0 +1,23 @@
+package common
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/spf13/cobra"
+)
+
+// PrettyPrintJSON prints m as an indented JSON to the cmd output.
+func PrettyPrintJSON(cmd *cobra.Command, m json.Marshaler, entity string) {
+	data, err := m.MarshalJSON()
+	if err != nil {
+		PrintVerbose("Can't convert %s to json: %w", entity, err)
+		return
+	}
+	buf := new(bytes.Buffer)
+	if err := json.Indent(buf, data, "", "  "); err != nil {
+		PrintVerbose("Can't pretty print json: %w", err)
+		return
+	}
+	cmd.Println(buf)
+}