Add item DataComponent implements (part 1)

level/component/damage.go

@@ -0,0 +1,28 @@
+package component
+
+import (
+	"io"
+
+	pk "github.com/Tnze/go-mc/net/packet"
+)
+
+var _ DataComponent = (*Damage)(nil)
+
+type Damage struct {
+	Damage pk.VarInt
+}
+
+// ID implements DataComponent.
+func (Damage) ID() string {
+	return "minecraft:damage"
+}
+
+// ReadFrom implements DataComponent.
+func (d *Damage) ReadFrom(r io.Reader) (n int64, err error) {
+	return d.Damage.ReadFrom(r)
+}
+
+// WriteTo implements DataComponent.
+func (d *Damage) WriteTo(w io.Writer) (n int64, err error) {
+	return d.Damage.WriteTo(w)
+}