Re-write README for universal LLM schemas

[samchon]

This pull request updates the README.md to modernize, clarify, and improve documentation for the @samchon/openapi library. The changes focus on making the documentation more accessible, emphasizing multi-provider support, simplifying code examples, and improving the presentation of key features and usage patterns.

Key improvements include:

Documentation Structure & Clarity

• Refactored and expanded the feature list, highlighting multi-provider support (OpenAI, Claude, Qwen, Llama, etc.), production-readiness, and improved TypeScript type safety.
• Reorganized and simplified code examples to show a clearer, step-by-step process for turning OpenAPI documents into LLM-callable applications, removing outdated or overly specific model references. [1] [2]
• Updated and clarified the introductory sections and feature highlights for easier onboarding. [1] [2]

Multi-Provider & Type Safety Focus

• Generalized all function calling examples and type definitions to be provider-agnostic, removing hardcoded model types and showing compatibility with any LLM provider. [1] [2] [3]
• Added a summary table of type definitions for applications, functions, parameters, and schemas across HTTP and MCP contexts.

Enhanced Validation and Human-AI Collaboration

• Improved documentation for runtime validation, including simplified example code and updated playground links. [1] [2]
• Clarified and streamlined the validation feedback loop for fixing LLM mistakes, with updated sample code. [1] [2]
• Added a new section on separating parameters between human and AI using the separate option, with a practical example.

Visual and Thematic Updates

• Updated all Mermaid diagrams to use flowchart TB for consistency and improved flow direction. [1] [2] [3]
• Replaced outdated or overly detailed diagrams and tables with more concise, modern representations. [1] [2]

Minor Corrections and Consistency

• Fixed minor typos, improved link accuracy, and updated terminology for clarity (e.g., "AI-callable" vs. "type-safe LLM function calling"). [1] [2] [3]

These changes make the documentation more user-friendly and position @samchon/openapi as a robust, provider-agnostic solution for LLM function calling.

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References:

Documentation Structure & Clarity

• Refactored feature list and onboarding:
• Simplified code examples and intro: [1] [2]

Multi-Provider & Type Safety Focus

• Generalized examples and types: [1] [2] [3]
• Added type definitions table:

Enhanced Validation and Human-AI Collaboration

• Improved validation docs and playground links: [1] [2]
• Updated validation feedback loop: [1] [2]
• Added parameter separation section:

Visual and Thematic Updates

• Updated Mermaid diagrams: [1] [2] [3]

Minor Corrections and Consistency

• Fixed typos and improved terminology: [1] [2] [3]

[Copilot]

Pull request overview

This PR modernizes the @samchon/openapi README to emphasize universal LLM provider support, removing vendor-specific bias and simplifying the documentation for broader adoption. The update transforms the library's positioning from OpenAI/Claude/Gemini-specific to a provider-agnostic solution that works with any LLM supporting function calling.

Key changes:

• Generalized all type definitions and examples to be provider-agnostic (removing model-specific generic parameters)
• Simplified code examples and improved onboarding flow
• Enhanced documentation for validation feedback and human-AI collaboration features

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
package.json	Updated package description to emphasize multi-provider support; replaced "gemini" keyword with "qwen" to reflect broader LLM coverage
README.md	Complete documentation overhaul: removed vendor-specific type parameters, simplified examples, added provider comparison table, enhanced validation and parameter separation sections, updated all Mermaid diagrams to use consistent flowchart direction

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