Refactoring required in `Introduction`

Bắt đầu bằng cách xác định nội dung Introduction trong docs/ và xem xét các phần Introduction, #-ai-usage-restriction và #-api-calls hiện có. So sánh nội dung API với repository wstack và xác minh rằng các liên kết cũng như ví dụ mã được đề xuất khớp với backend hiện tại. Công việc được xem là hoàn thành khi phần giới thiệu ngắn gọn, các phần được liên kết tồn tại, hướng dẫn về AI đã được cập nhật và tài liệu API dựa trên Hono chính xác.

This issue outlines necessary improvements to the repository's documentation structure and content to enhance clarity and maintain consistency with project standards in docs/ a.k.a Introduction

Proposed Changes

1. Streamline Introduction Section

Current State
Introduction is overly verbose and reads like a blog post rather than project documentation.

Requested Change

• Trim introductory content to be more concise
• use more images/banners than text
• Maintain only essential headings with brief descriptions
• Add direct links to detailed documentation pages
• Follow the pattern:
  Example Structure

  ## API Usage 
  [Brief 2-3 sentence description]  
  For full documentation: [API Overview](/docs/API/Overview)
  

Acceptance Criteria

• Introduction trimmed and also is having more banners.
• All major sections contain documentation links
• Verify all linked doc pages exist

2. Revise AI Usage Guidance

Current State
#-ai-usage-restriction section sends conflicting messages about AI tool usage.

Requested Change

• Remove restrictive language about AI usage
• Add helpful system prompt for AI-assisted development:

  ## AI Assistance Guidance
  For optimal results with AI tools (Cursor, VS Code Copilot, etc.), use this prompt:
  "When working with [Project Name], follow these patterns: [list key patterns]"
  

• Include examples of AI-friendly configuration

Acceptance Criteria

• Remove existing restriction section from introduction
• Add new AI guidance section
• Verify prompt examples work with common AI tools
• *Make and Add new system prompt for the project. (will require changes here as well as in the wstack repo); so please open new issues.

3. Update API Documentation

Current State
#-api-calls section contains Next.js implementation details. But we're using HONO.dev

Requested Change

• Conduct technical review of API documentation in contrast with the wstack repo
• Update content to reflect current backend implementation
• Add direct link to backend documentation:
  See backend implementation: [API Services](/docs/API/Services)

Acceptance Criteria

• Technical review completed
• Implementation details updated
• Verify code samples match current codebase
• Add links to relevant backend docs