add embedding mapper for text-embedding-ada-002 model

[fakechris]

No description provided.

[Wetiqe]

I was thinking about doing the same thing. This works fine for the embedding model. This will be useful for using packages such as llama-index

[haibbo]

@fakechris
Thanks for your PR, It‘s useful for developer.
Here are some suggestions:
1, Add a function to handler /v1/moderations, e.g. handleModerations

• this change will make route part clear

2, Remove text-embedding-ada-002 mapper

• Most users are not developers, and adding this mapper would make it more difficult for them to configure.
• However, it's easy for developers to add a model mapper they are familiar with.

[lubuwei001]

@fakechris Thanks for your PR, It‘s useful for developer. Here are some suggestions: 1, Add a function to handler /v1/moderations, e.g. handleModerations

• this change will make route part clear

2, Remove text-embedding-ada-002 mapper

• Most users are not developers, and adding this mapper would make it more difficult for them to configure.
• However, it's easy for developers to add a model mapper they are familiar with.

When using text analysis services such as Zotero GPT, there is still a need to add an embedding mapper for the text-embedding-ada-002 model. Thank you for the code @fakechris , it's very helpful.