Add HeXi bot codebase: custom plugins, web frontends, tests

- hexi core: message handling, rate limiting, cooldown, plugin manager
- Custom plugins: BF stats, daily check-in, quotes, persona cards, etc.
- Community plugins vendored under hexi/plugins with local fixes
- Web admin frontends (learning-chat, persona-admin), unified hexi/web
- Tests for rate_limit/cooldown/memes/persona; poetry.lock

Co-Authored-By: Claude <noreply@anthropic.com>

hexi/plugins/nonebot_plugin_group_tools/__init__.py

@@ -0,0 +1,33 @@
+from nonebot import require
+from nonebot.plugin import PluginMetadata
+
+require("nonebot_plugin_alconna")
+
+__plugin_meta__ = PluginMetadata(
+    name="群管理工具",
+    description=(
+        "群管理指令与群管小功能合集:龙王查询、禁言、头衔、名片、群名管理、"
+        "违禁词语音、聊天互动、退群通知、随机复读、禁言套餐"
+    ),
+    usage=(
+        "注意本页指令可能由于风控在您的群不可用\n"
+        "[谁是龙王] 查看本群龙王\n"
+        "[龙王榜] 查看本群B话最多的人\n"
+        "以下指令需要机器人是管理员, 且被执行人是普通群员\n"
+        "[修改群名XXX] 群名修改为XXX\n"
+        "[修改名片XXX@某人] 修改某人的群名片为XXX\n"
+        "[来发口球360@某人] 禁言某人360秒, 可以修改为自己需要的时间\n"
+        "[解除口球@某人] 取消某人的禁言\n"
+        "[全员口球] 开启全员禁言\n"
+        "[取消全员禁言] 关闭全员禁言\n"
+        "[极限一换一60@某人]神秘功能, 60可以修改为30以下的秒数\n"
+        "[申请头衔XXX] 申请/删除专属头衔(bot需为群主)\n"
+        "[违禁词] 触发黑手语音\n"
+        "[沙雕机器人/老婆/老公/mua/何意味/确实/内鬼...] 聊天互动\n"
+        "[睡眠套餐/精致睡眠] 8小时禁言(bot需具有群管理权限)\n"
+        "[来一份精致昏睡下午茶套餐] 随机时长禁言(bot需具有群管理权限)"
+    ),
+    type="application",
+)
+
+from .handlers import chat, management, notices, repeater  # noqa: E402,F401