feat(agent): add config sub commands

internal/command/agent/root.go

@@ -2,6 +2,7 @@ package agent
 
 import (
 	"forge.cadoles.com/Cadoles/emissary/internal/command/agent/openwrt"
+	"forge.cadoles.com/Cadoles/emissary/internal/command/config"
 	"github.com/urfave/cli/v2"
 )
 
@@ -11,6 +12,7 @@ func Root() *cli.Command {
 		Usage: "Agent related commands",
 		Subcommands: []*cli.Command{
 			openwrt.Root(),
+			config.Root(),
 			RunCommand(),
 		},
 	}