Add item DataComponent implements (part 2)

level/component/mapcolor.go

@@ -0,0 +1,15 @@
+package component
+
+import pk "github.com/Tnze/go-mc/net/packet"
+
+var _ DataComponent = (*MapColor)(nil)
+
+type MapColor struct {
+	// The RGB components of the color, encoded as an integer.
+	pk.Int
+}
+
+// ID implements DataComponent.
+func (MapColor) ID() string {
+	return "minecraft:map_color"
+}