## description
- I refactor `Chathunyuan` using tencentcloud sdk because I found the
original one can't work in my application
- I add `HunyuanEmbeddings` using tencentcloud sdk
- Both of them are extend the basic class of langchain. I have fully
tested them in my application
## Dependencies
- tencentcloud-sdk-python
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Co-authored-by: centonhuang <centonhuang@tencent.com>
Co-authored-by: Erick Friis <erick@langchain.dev>
