Add comprehensive documentation overview for Ray.InputQuery

Author: koriym

docs/README.md

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+# Documentation Overview
+
+This directory contains comprehensive documentation for Ray.InputQuery.
+
+## Directory Structure
+
+### prompts/
+Contains AI prompts for automatic generation and development assistance:
+- **input-class-generator.md** - Prompt for generating Input classes from forms or parameter lists
+- **usage-generator.md** - Prompt for generating usage examples and integration patterns
+- **README.md** - Usage guide for the prompt files
+
+These prompts help developers leverage AI to accelerate Ray.InputQuery adoption and implementation.
+
+### design/
+Contains design philosophy, concepts, and architectural documentation:
+- Design principles and philosophy behind Ray.InputQuery
+- Input-as-first-class-citizen concept explanations
+- Innovation patterns and use case studies
+- Framework philosophy and architectural decisions
+
+The design documentation explains the theoretical foundation and rationale behind Ray.InputQuery's approach to input handling.
+
+### sample-data/
+Contains various data format examples and patterns for Input class generation:
+- Sample data in different formats (HTML forms, JSON schemas, GraphQL schemas, CSV data, OpenAPI specs)
+- PHP method signatures and scalar-to-structured transformation patterns
+- UI mockups and wireframes examples
+- ALPS profiles for API documentation
+
+These samples serve as reference material and test cases for Input class generation and demonstrate real-world data structure patterns.
+
+---
+
+Use these resources to understand, implement, and extend Ray.InputQuery in your projects.