v1.2 release

You can search your models now, and load model directly from model management
Added Update tab to allow extension and model source update.

to install, unzip miaoshouai-assistant.zip and put it under extensions folder of webui

1.2版本添加了模型管理下的搜索，支持直接模型加载
增加了更新tab，可以通过更新更新模型源数据

解压miaoshouai-assistant-cn.zip 到webui下的extensions下面的文件夹