[#216] blobovnicza: Define Blobovnicza type

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/local_object_storage/blobovnicza/blobovnicza.go

@@ -0,0 +1,29 @@
+package blobovnicza
+
+// Blobovnicza represents the implementation of NeoFS Blobovnicza.
+type Blobovnicza struct {
+	*cfg
+}
+
+// Option is an option of Blobovnicza's constructor.
+type Option func(*cfg)
+
+type cfg struct {
+}
+
+func defaultCfg() *cfg {
+	return &cfg{}
+}
+
+// New creates and returns new Blobovnicza instance.
+func New(opts ...Option) *Blobovnicza {
+	c := defaultCfg()
+
+	for i := range opts {
+		opts[i](c)
+	}
+
+	return &Blobovnicza{
+		cfg: c,
+	}
+}