feat: add annotation to add command description

src/main/kotlin/cn/rtast/fancybot/commands/niuzi/NiuziTransferCommand.kt

@@ -7,12 +7,14 @@
 
 package cn.rtast.fancybot.commands.niuzi
 
+import cn.rtast.fancybot.annotations.CommandDescription
 import cn.rtast.fancybot.niuziManager
 import cn.rtast.rob.entity.GroupMessage
 import cn.rtast.rob.enums.ArrayMessageType
 import cn.rtast.rob.util.BaseCommand
 import cn.rtast.rob.util.ob.OneBotListener
 
+@CommandDescription("将自己的牛子长度转账给别人")
 class NiuziTransferCommand : BaseCommand() {
     override val commandNames = listOf("牛子转账", "转账", "/zz")