feat: add niuzi command

src/main/kotlin/cn/rtast/fancybot/entity/db/NiuziTable.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/9/8
+ */
+
+
+package cn.rtast.fancybot.entity.db
+
+import org.jetbrains.exposed.sql.Table
+
+object NiuziTable : Table("niuzu") {
+    val length = double("length")
+    val id = long("id").autoIncrement()
+    val userId = long("userId").uniqueIndex()
+    val timestamp = long("timestamp")
+    override val primaryKey = PrimaryKey(id)
+}
+
+data class Niuzi(
+    val userId: Long,
+    val length: Double,
+    val timestamp: Long
+)