Create README.md

[monica-cheng1]

Greptile Summary

The PR creates a product-focused README explaining Graph Maker’s capabilities, supported visualization categories, inputs and outputs, use cases, FAQ, and relationship to Platforma.

• Graph Maker block — The Platforma integration for constructing visualizations; newly introduced as the README’s central product term and described as composing data across project blocks.
• Graph — An independently named and configured visualization stored in a Graph Maker block; documented as supporting multiple graphs and separate sections.
• Graph data model — The configuration contract underlying graph state; indirectly documented through descriptions of saved graph configuration and live upstream data.
• Chart type — A selectable visualization template; the README adds a categorized overview of the repository’s 28 catalog entries.
• Statistical testing — Group-comparison analysis and significance annotation; newly documented with supported tests, comparison modes, and multiple-comparison correction.
• Project column — A data field produced by an upstream block or sample metadata; newly described as available for axes, grouping, color, and size.
• Platforma — The host biologics-discovery platform; newly defined through ecosystem and documentation links.

Confidence Score: 5/5

The documentation-only PR appears safe to merge, with no concrete incorrect or broken behavior established.

The README’s verifiable claims align with the repository’s 28-entry chart catalog and multi-graph state model, while claims implemented by external Platforma packages were not contradicted by available evidence.

Important Files Changed

Filename	Overview
README.md	Adds comprehensive user-facing product documentation; checked repository evidence supports the chart count and multi-graph model, with no concrete defect established.

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