feat: add developer message

[Nov1c444]

Pull Request Checklist

According to OpenAI's model spec, change the prompt type of GPT models after o1 to developer type: https://cdn.openai.com/spec/model-spec-2024-05-08.html#follow-the-chain-of-command
https://platform.openai.com/docs/guides/reasoning-best-practices#how-to-prompt-reasoning-models-effectively

related PR: langgenius/dify-official-plugins#1541

Compatibility Check

• I have checked whether this change affects the backward compatibility of the plugin declared in README.md
• I have checked whether this change affects the forward compatibility of the plugin declared in README.md
• If this change introduces a breaking change, I have discussed it with the project maintainer and specified the release version in the README.md
• I have described the compatibility impact and the corresponding version number in the PR description
• I have checked whether the plugin version is updated in the README.md

Available Checks

• Code has passed local tests
• Relevant documentation has been updated (if necessary)

[Yeuoly]

LGTM