docs: Add comprehensive README with recode-website replication and contribution guidelines

[Copilot]

Overview

This PR addresses the issue by transforming the minimal README into a comprehensive guide that explains how to replicate the recode-website project and provides clear contribution guidelines for the repository.

What's Added

🚀 Project Overview

• Clear introduction to the Contributor repository's purpose
• Detailed explanation of the Recode Website project (Docusaurus v3-based documentation platform)
• Project features and capabilities overview

🔧 Replication Instructions

Added three different methods to replicate the recode-website project:

1. Standard Setup (Recommended) - Using npm/yarn with step-by-step instructions
2. Docker Setup - For containerized development environment
3. Docker Compose - Alternative Docker-based approach

Each method includes:

• Prerequisites and system requirements
• Complete command sequences
• Environment configuration guidance
• Local development server setup

🤝 Contribution Guidelines

• Step-by-step contribution workflow with visual Mermaid diagram
• Fork → Clone → Branch → Code → Test → Commit → Push → PR process
• Types of contributions welcome (documentation, bug fixes, features, UI/UX, testing, content)
• Commit message conventions following conventional commits
• Pull request guidelines and best practices

📋 Additional Resources

• Project structure overview showing the recode-website architecture
• Development scripts and commands reference
• Links to Code of Conduct and detailed contributing guidelines
• Community resources (Discord, LinkedIn, Newsletter)
• Video tutorial and documentation links

Technical Details

The README now provides:

• Prerequisites: Node.js 18+, npm/yarn, Git, Docker (optional)
• Setup Methods: Three comprehensive approaches for different developer preferences
• Project Structure: Clear overview of the Docusaurus-based architecture
• Development Workflow: Scripts for build, serve, typecheck, and more
• Community Integration: Direct links to existing community resources and guidelines

Impact

This change transforms the repository from a basic placeholder into a functional onboarding hub that:

• Reduces barriers to entry for new contributors
• Provides clear, actionable instructions for project replication
• Establishes consistent contribution practices
• Connects contributors to the broader Recode community ecosystem

The documentation follows the existing patterns and resources from the recode-website repository while being tailored specifically for the Contributor repository's purpose as a central guide.

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