jpictl: add --version and version command

from `git describe` using go:generate and embed

Signed-off-by: Alejandro Mery <amery@jpi.io>

cmd/jpictl/main.go

@@ -2,6 +2,8 @@
 package main
 
 import (
+	_ "embed"
+
 	"github.com/spf13/cobra"
 )
 
@@ -12,8 +14,9 @@ const (
 
 var (
 	rootCmd = &cobra.Command{
-		Use:   CmdName,
-		Short: "control tool for jpi.cloud",
+		Use:     CmdName,
+		Short:   "control tool for jpi.cloud",
+		Version: version,
 	}
 )