✨ 添加Marsho AI插件，整合Azure服务，更新配置和元数据，修复startup加载两次的问题

nonebot_plugin_marshoai/metadata.py

@@ -0,0 +1,14 @@
+from nonebot.plugin import PluginMetadata, inherit_supported_adapters
+from .config import ConfigModel, config
+from .constants import USAGE
+
+metadata = PluginMetadata(
+    name="Marsho AI插件",
+    description="接入Azure服务的AI聊天插件",
+    usage=USAGE,
+    type="application",
+    config=ConfigModel,
+    homepage="https://github.com/LiteyukiStudio/nonebot-plugin-marshoai",
+    supported_adapters=inherit_supported_adapters("nonebot_plugin_alconna"),
+    extra={"License": "MIT", "Author": "Asankilp"},
+)