添加强制设置昵称配置项，移动测试插件到单独文件夹，稍微修改memory插件description（应该还是无法达到预期喵）

nonebot_plugin_marshoai/config.py

@@ -34,8 +34,9 @@ class ConfigModel(BaseModel):
     marshoai_single_latex_parse: bool = False
     marshoai_enable_nickname_tip: bool = True
     marshoai_enable_support_image_tip: bool = True
+    marshoai_enforce_nickname: bool = True
     marshoai_enable_praises: bool = True
-    marshoai_enable_time_prompt: bool = True
+    # marshoai_enable_time_prompt: bool = True
     marshoai_enable_tools: bool = False
     marshoai_enable_plugins: bool = True
     marshoai_load_builtin_tools: bool = True