Re-added the beta assistants API

[CongquanHu]

Based on the latest changes to the library, I added APIs related to assistants to make PR merging easier.
1.Added beta assistants API (mostly)
2.The APIs used in the assistants demo flow were tested

[CongquanHu]

@kayhantolga
I looked at the latest library changes, indeed the previous PR and dev content is diff too much, very easy to cause conflict, so I decided to readjust.

I fork again and delete the previous fork warehouse (I don't know if there is any other way, I haven't thought of any other way for the time being, please let me know if there is, thank you).
Assistants API for openai beta was added again, conflicting files were checked, and response adjustments were made. Fortunately, there were not many conflicting files, and I quickly adjusted them.

Most of the API has written test code, and some parts I will add later after self-testing.
Hopefully, this new PR will facilitate branch merging.

Looking forward to your reply, thank you

[CongquanHu]

I'm done. Please let me know if there is anything wrong.

[dmki]

Typo: Insturctions
Also, can you replace Chinese with English, please?

[CongquanHu]

Typo: Insturctions Also, can you replace Chinese with English, please?

@dmki Thank you for reminding me.
I have changed the Chinese content of Instructions into English in the last commit.

[giovanni-a]

Thanks for this PR! I tested it, it works great! Small typo here: "StaticValues.AssistatntsStatics" instead of "StaticValues.AssistantsStatics"

[CongquanHu]

Thanks for this PR! I tested it, it works great! Small typo here: "StaticValues.AssistatntsStatics" instead of "StaticValues.AssistantsStatics"

Thank you for reminding me. It's fixed.

[JKetelaar]

Any update on this?