[#1714] lens: Separate commands

Separate `inspect` and `list` on `write-cache` and `blobovnicza`
subcommands.

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

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

@@ -0,0 +1,19 @@
+package writecache
+
+import "github.com/spf13/cobra"
+
+var (
+	vAddress string
+	vPath    string
+	vOut     string
+)
+
+// Root contains `write-cache` command definition.
+var Root = &cobra.Command{
+	Use:   "write-cache",
+	Short: "Operations with write-cache",
+}
+
+func init() {
+	Root.AddCommand(listCMD, inspectCMD)
+}