feat: add Higress ai model provider

[WindWaving]

💻 变更类型 | Change Type

• ✨ feat
• 🐛 fix
• ♻️ refactor
• 💄 style
• 👷 build
• ⚡️ perf
• 📝 docs
• 🔨 chore

🔀 变更说明 | Description of Change

设置-语言模型新增支持Higress AI provider

📝 补充信息 | Additional Information

语言模型新增Higress provider

对话信息

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