[#1714] lens: Add open*COMPONENT* funcs

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

cmd/neofs-lens/internal/meta/root.go

@@ -1,7 +1,12 @@
 package meta
 
 import (
+	"time"
+
+	common "github.com/nspcc-dev/neofs-node/cmd/neofs-lens/internal"
+	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/spf13/cobra"
+	"go.etcd.io/bbolt"
 )
 
 var (
@@ -28,3 +33,17 @@ func init() {
 		listGarbageCMD,
 	)
 }
+
+func openMeta(cmd *cobra.Command) *meta.DB {
+	db := meta.New(
+		meta.WithPath(vPath),
+		meta.WithBoltDBOptions(&bbolt.Options{
+			ReadOnly: true,
+			Timeout:  100 * time.Millisecond,
+		}),
+		meta.WithEpochState(epochState{}),
+	)
+	common.ExitOnErr(cmd, common.Errf("could not open metabase: %w", db.Open(true)))
+
+	return db
+}