feat: Enhance ChatCerebras integration (v3.0)

[sebastiand-cerebras]

• Add model dropdown with 5 Cerebras models and descriptions
• Automatically include X-Cerebras-3rd-Party-Integration header
• Set llama3.1-8b as default model
• Improve credential description with clearer instructions
• Bump ChatCerebras to v3.0 and CerebrasApi to v2.0

This update provides a better user experience with:

• Easy model selection via dropdown instead of manual input
• Automatic integration tracking for better support
• Clear model descriptions to help users choose the right one
• Consistent API configuration without manual setup

[gemini-code-assist]

Summary of Changes

Hello @sebastiand-cerebras, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly upgrades the integration with ChatCerebras, focusing on improving user experience and streamlining API interactions. It introduces a more intuitive way for users to select models and ensures consistent API configuration, ultimately making the platform easier to use and support.

Highlights

• Enhanced Model Selection: Replaced manual model input with a dropdown menu featuring five Cerebras models, each with a descriptive summary, and set 'llama3.1-8b' as the default.
• Automatic Integration Tracking: Implemented an automatic 'X-Cerebras-3rd-Party-Integration' header for all API requests to improve support and tracking.
• Improved Credential Guidance: Updated the Cerebras API key credential description with clearer instructions and a direct link for obtaining the key.
• Version Bumps: Incremented the 'ChatCerebras' component version to '3.0' and the 'CerebrasApi' credential version to '2.0'.

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[gemini-code-assist]

Code Review

This pull request enhances the ChatCerebras integration by adding a model selection dropdown, automatically including an integration header, and improving descriptions. The changes are well-aligned with the goal of improving user experience.

I've provided two main pieces of feedback:

1. A suggestion to refactor the hardcoded list of Cerebras models into a constant for better maintainability.
2. A code simplification for setting the API configuration, which also resolves a potential bug where the baseURL could become an empty string.

Overall, this is a great update. Addressing the feedback will make the code more robust and easier to maintain.

[HenryHengZJ]

If we want to switch to using dropdown for models, they should go to models.json

[sebastiand-cerebras]

@HenryHengZJ thank you so much for your feedback. I integrated your request -- somehow that slipped off my plate but still would love to integrate with you guys. Flowise is really well done! LMK if you want any other changes!