Add item DataComponent implements (part 3)

level/component/bundlecontents.go

@@ -0,0 +1,24 @@
+package component
+
+import "io"
+
+var _ DataComponent = (*BundleContents)(nil)
+
+type BundleContents struct {
+	// TODO
+}
+
+// ID implements DataComponent.
+func (BundleContents) ID() string {
+	return "minecraft:bundle_contents"
+}
+
+// ReadFrom implements DataComponent.
+func (b *BundleContents) ReadFrom(r io.Reader) (n int64, err error) {
+	panic("unimplemented")
+}
+
+// WriteTo implements DataComponent.
+func (b *BundleContents) WriteTo(w io.Writer) (n int64, err error) {
+	panic("unimplemented")
+}