Revise index.md to enhance onboarding guidance for AI-Assisted Coding…

[seiggy]

This pull request significantly improves the onboarding experience for the AI-Assisted Coding framework by replacing the previous markdown include with a comprehensive, user-friendly index page for coding challenges. The new goals/index.md file now serves as a central hub, guiding users through language-specific challenge tracks and providing helpful tips and context.

Enhancements to onboarding documentation:

• Replaced the markdown include with a custom index page that introduces the AI-Assisted Coding challenge framework and outlines the progression for each language track.
• Added a quick-start table for .NET/C#, Java, Python, and TypeScript/JS, linking directly to setup and requirements challenges for each stack.
• Included a recommended workflow section to clarify the steps users should follow for effective onboarding.

Guidance and productivity improvements:

• Added a tips section with a link to advanced techniques for writing better prompts and requirements.
• Provided an explanation of what the AI is learning throughout the challenge process, emphasizing architectural memory and context-aware reasoning.… framework, including structured challenge progression and quick start by language.

[Copilot]

Pull Request Overview

This pull request transforms the goals/index.md file from a simple markdown include to a comprehensive onboarding hub for the AI-Assisted Coding framework. The change provides structured navigation, clear guidance, and detailed explanations to improve the user experience when starting with the framework.

Key changes:

• Replaced markdown include with dedicated index content featuring language-specific quick start tables
• Added structured workflow recommendations and tips section
• Included educational content about AI learning capabilities throughout the challenge process

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