feat: upgrade music command and add get song play url command

src/main/kotlin/cn/rtast/fancybot/entity/music/SongUrl.kt

@@ -0,0 +1,16 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/9/16
+ */
+
+
+package cn.rtast.fancybot.entity.music
+
+data class SongUrl(
+    val data: List<Data>
+) {
+    data class Data(
+        val url: String
+    )
+}