Improve louis ai chatbot prompt

[yiilinzhang]

Description

The currrent Louis bot tends to use console.log and JS specific functions not available on source. Adjusted the prompt passed in to open ai to emphasize not to use methods not available in Source.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Code quality improvements

Checklist

• I have tested this code
• I have updated the documentation

[Copilot]

Pull request overview

This PR enhances the Louis chatbot prompt to prevent it from generating JavaScript code that is incompatible with the Source language used in the Source Academy platform. The changes add explicit instructions to the AI model about Source language restrictions and proper output functions.

Changes:

• Updated the chatbot system prompt to emphasize Source language constraints and proper syntax usage
• Added explicit guidance to use display or display_list instead of console.log
• Included warnings about unsupported JavaScript features (classes, modules, async/await, etc.)

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[coveralls]

coverage: 89.178%. remained the same
when pulling 3a06d70 on feature/louis
into 9a7da2c on master.

[RichDom2185]

LGTM, thanks!