feat: add annotation to add command description

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

@@ -7,27 +7,31 @@
 
 package cn.rtast.fancybot.commands
 
+import cn.rtast.fancybot.annotations.CommandDescription
 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.OneBotListener
 
+@CommandDescription("AAAA")
 class HelpCommand : BaseCommand() {
     override val commandNames = listOf("/help", "/帮助")
 
     override suspend fun executeGroup(listener: OneBotListener, message: GroupMessage, args: List<String>) {
-        val allCommands = commands.sortedBy { it::class.simpleName }.joinToString("\n") {
-            "[${
-                it.javaClass.name.split(".")
-                    .last().replace("Command", "")
-            }] 命令:${it.commandNames.joinToString(",")}"
-        }
         val msg = MessageChain.Builder()
-            .addAt(message.sender.userId)
-            .addNewLine()
-            .addText(allCommands)
-            .build()
-        listener.sendGroupMessage(message.groupId, msg)
+        commands.sortedBy { it::class.simpleName }.forEach {
+            val description =
+                if (!it.javaClass.isAnnotationPresent(CommandDescription::class.java)) {
+                    "暂无描述"
+                } else {
+                    it.javaClass.getAnnotation(CommandDescription::class.java)?.description!!
+                }
+            val commandName = it::class.simpleName?.replace("Command", "")!!
+            val commandNames = it.commandNames.joinToString(",")
+            msg.addText("[$commandName] [$description] 命令: $commandNames")
+                .addNewLine()
+        }
+        message.reply(msg.build())
     }
 }