feat: add annotation to add command description

src/main/kotlin/cn/rtast/fancybot/commands/AboutCommand.kt

@@ -7,11 +7,13 @@
 
 package cn.rtast.fancybot.commands
 
+import cn.rtast.fancybot.annotations.CommandDescription
 import cn.rtast.rob.entity.GroupMessage
 import cn.rtast.rob.util.BaseCommand
 import cn.rtast.rob.util.ob.MessageChain
 import cn.rtast.rob.util.ob.OneBotListener
 
+@CommandDescription("关于")
 class AboutCommand : BaseCommand() {
     override val commandNames = listOf("/about", "/关于")