Add support for VolcEngine - the current version supports SDK2

[yungongzi]

• The main idea is to assemble ak, sk, and ep_id into a dictionary and store it in the database api_key field
• I don’t know much about the front-end, so I learned from Ollama, which may be redundant.

Configuration method

• model name

• Format requirements: {"VolcEngine model name":"endpoint_id"}

  • For example: {"Skylark-pro-32K":"ep-xxxxxxxxx"}

• Volcano ACCESS_KEY

  • Format requirements: VOLC_ACCESSKEY of the volcano engine corresponding to the model

• Volcano SECRET_KEY

  • Format requirements: VOLC_SECRETKEY of the volcano engine corresponding to the model

What problem does this PR solve?

Briefly describe what this PR aims to solve. Include background context that will help reviewers understand the purpose of the PR.

Type of change

• New Feature (non-breaking change which adds functionality)

[JinHai-CN]

Thank you for you contribution! We intend to create an international community, so we encourage using English for issues and pull requests. Would you please update the PR description and the code comments ?

[yungongzi]

Thank you for you contribution! We intend to create an international community, so we encourage using English for issues and pull requests. Would you please update the PR description and the code comments ?

I have made modifications. Since this is my first PR, please give me some guidance.

[cike8899]

well done