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_makeaquote/__init__.py

@@ -0,0 +1,36 @@
+from nonebot import logger, on_message, require
+
+require("nonebot_plugin_alconna")
+from nonebot_plugin_alconna import UniMessage
+from nonebot.adapters.onebot.v11 import Bot, Event
+from nonebot.plugin import PluginMetadata
+from nonebot.rule import keyword
+
+from .Reply import extract_reply
+from .make_a_qoute import generate
+
+__plugin_meta__ = PluginMetadata(
+    name="语录",
+    description="生成一条语录",
+    usage="发送【maq】",
+    type="application",
+)
+
+maq = on_message(keyword("maq"))
+
+
+@maq.handle()
+async def maq_handle(bot: Bot, ev: Event):
+    event = ev.dict()
+    try:
+        if event.get("message_type") != "group":
+            return
+        reply = await extract_reply(event, bot)
+        if reply.message == -1:
+            await maq.finish("请引用文字消息")
+        logger.info(f"{reply.user_id}, {reply.user_card}, {reply.message}")
+        image = await generate(reply)
+        await UniMessage.image(raw=image.getvalue()).send()
+    except (KeyError, TypeError) as e:
+        logger.error(e)
+        await maq.finish(str(e))