feat: add slime chunk helper command

src/main/kotlin/cn/rtast/fancybot/Const.kt

@@ -119,5 +119,5 @@ val commands = listOf(
     ReactionCommand(), MCSkinCommand(),
     GithubLatestCommitCommand(), RandomMusicCommand(),
     ZDJDCommand(), ScanQRCodeCommand(),
-    TTSCommand()
+    TTSCommand(), SlimeChunkHelperCommand()
 )