Add item DataComponent implements (part 1)

level/component/customdata.go

@@ -0,0 +1,29 @@
+package component
+
+import (
+	"io"
+
+	"github.com/Tnze/go-mc/nbt/dynbt"
+	pk "github.com/Tnze/go-mc/net/packet"
+)
+
+var _ DataComponent = (*CustomData)(nil)
+
+type CustomData struct {
+	dynbt.Value
+}
+
+// ID implements DataComponent.
+func (CustomData) ID() string {
+	return "minecraft:custom_data"
+}
+
+// ReadFrom implements DataComponent.
+func (c *CustomData) ReadFrom(r io.Reader) (n int64, err error) {
+	return pk.NBT(c).ReadFrom(r)
+}
+
+// WriteTo implements DataComponent.
+func (c *CustomData) WriteTo(w io.Writer) (n int64, err error) {
+	return pk.NBT(c).WriteTo(w)
+}