feat: add zibi and unset zibi command, bump rob to 1.8.4

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

@@ -11,12 +11,12 @@ import cn.rtast.fancybot.commands
 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.OBMessage
+import cn.rtast.rob.util.ob.OneBotListener
 
 class HelpCommand : BaseCommand() {
     override val commandNames = listOf("/help", "/帮助")
 
-    override suspend fun executeGroup(listener: OBMessage, message: GroupMessage, args: List<String>) {
+    override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
         val allCommands = commands.joinToString("\n") {
             "[${it.javaClass.name.split(".").last().replace("Command", "")}] 命令:${it.commandNames.joinToString(",")}"
         }