feat: add query mc skin command

src/main/kotlin/cn/rtast/fancybot/entity/mc/Skin.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/10/2
+ */
+
+
+package cn.rtast.fancybot.entity.mc
+
+import com.google.gson.annotations.SerializedName
+
+data class Skin(
+    val properties: List<Property>,
+) {
+    data class Property(
+        val value: String,
+    )
+}
+
+data class DecodedSkin(
+    val textures: Texture,
+) {
+    data class Texture(
+        @SerializedName("SKIN")
+        val skin: SKIN,
+    )
+
+    data class SKIN(
+        val url: String,
+    )
+}

src/main/kotlin/cn/rtast/fancybot/entity/mc/Username.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/10/2
+ */
+
+
+package cn.rtast.fancybot.entity.mc
+
+data class Username(val id: String)