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_dailywife/utils.py

@@ -0,0 +1,50 @@
+import hashlib
+import json
+from nonebot.log import logger as sv
+import os
+import random
+import time
+from io import BytesIO
+
+import aiohttp
+import qrcode
+import requests
+import requests.exceptions
+from PIL import Image, ImageDraw, ImageFont
+
+
+# PNG重绘大小
+def png_resize(source_file, new_width=0, new_height=0, resample="LANCZOS", ref_file=''):
+    """
+    PNG缩放透明度处理
+    :param source_file: 源文件（Image.open()）
+    :param new_width: 设置的宽度
+    :param new_height: 设置的高度
+    :param resample: 抗锯齿
+    :param ref_file: 参考文件
+    :return:
+    """
+    img = source_file
+    img = img.convert("RGBA")
+    width, height = img.size
+
+    if ref_file != '':
+        imgRef = Image.open(ref_file)
+        new_width, new_height = imgRef.size
+    else:
+        if new_height == 0:
+            new_height = new_width * width / height
+
+    bands = img.split()
+    resample_map = {
+        "NEAREST": Image.NEAREST,
+        "BILINEAR": Image.BILINEAR,
+        "BICUBIC": Image.BICUBIC,
+        "LANCZOS": Image.LANCZOS
+    }
+    resample_method = resample_map.get(resample, Image.LANCZOS)  # 默认使用 LANCZOS
+
+    bands = [b.resize((new_width, new_height), resample=resample_method) for b in bands]
+    resized_file = Image.merge('RGBA', bands)
+
+    return resized_file