Added SetSpeedEvent.

core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/SetSpeedEvent.kt

@@ -0,0 +1,14 @@
+package cn.rdlevel.rdkt.core.events
+
+
+import cn.rdlevel.rdkt.core.data.Easing
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+@SerialName("SetSpeed")
+public data class SetSpeedEvent(
+    var speed: Double = 1.0,
+    var duration: Double = 0.0,
+    var ease: Easing = Easing.LINEAR,
+) : ActionEvent()