docs: Update documentation structure to reflect experiments-first paradigm #2394
      
        
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Problem Description:
Documentation structure was outdated and didn't reflect the current library focus on experiments and custom metrics. The library has evolved to emphasize systematic experimentation and custom metrics for evaluating any AI application.
Changes Made
Home page (
docs/index.md): Added "Why Ragas?" section explaining value proposition and key features. Updated to reflect experiments-first approach, custom metrics, and broader AI application evaluation. Removed FAQ section and improved card descriptions to be more actionable.Get Started (
docs/getstarted/index.md): Reorganized to reflect experiments quickstart as the main entry point. Removed links to outdated RAG-focused tutorials (evals.md, rag_eval.md, rag_testset_generation.md). Added Discord community link and organized tutorials into clearer sections.Core Concepts (
docs/concepts/index.md): Reordered sections to prioritize Experimentation and Datasets at the top with separate cards. Updated metrics description to reflect both available metrics library and creating custom metrics. Removed Feedback Intelligence card. Moved Components to the end.Navigation (
mkdocs.yml): Updated navigation structure to match current library organization. Removed outdated tutorials from Get Started navigation. Flattened Experiments section (Experimentation and Datasets as direct children). Removed Feedback Intelligence from navigation. Reorganized to reflect experiments-first paradigm.Testing
How to Test
References
Screenshots/Examples (if applicable)