✨ Improve README formatting and add comprehensive documentation

[melotik]

🎯 Overview

This PR significantly improves the README.md with a comprehensive and visually appealing format that better represents the educational value of this Rust bootcamp repository.

🚀 Changes Made

✅ Enhanced Formatting

• Added emojis and visual hierarchy for better readability
• Created a structured table of contents
• Used consistent formatting throughout

✅ Comprehensive Documentation

• Course Structure: Clear overview of all learning modules (1-hello-world through 6-traits)
• Learning Objectives: Defined key goals and outcomes
• Module Breakdown: Detailed description of each section with time estimates
• Prerequisites: Clear expectations for learners

✅ Developer Experience Improvements

• Getting Started: Step-by-step installation and setup instructions
• Running Examples: Clear commands to execute code in each module
• Learning Resources: Links to official Rust documentation and substreams resources
• Acknowledgments: Recognition of Edge & Node and the Rust community

✅ Professional Polish

• Consistent markdown formatting
• Professional structure suitable for educational repositories
• Clear navigation and organization
• Added contributing guidelines

🎨 Before vs After

Before: Simple 2-line README

# Rust Bootcamp

Learning rust to build substreams.

After: Comprehensive 100+ line educational resource with:

• Structured learning path
• Setup instructions
• Resource links
• Professional presentation

🎓 Impact

This improved README transforms the repository from a basic code collection into a proper educational resource that:

• Helps learners understand the bootcamp structure
• Provides clear navigation through the learning modules
• Sets appropriate expectations for time commitment
• Creates a professional impression for portfolio purposes

The documentation now properly reflects the quality and educational value of the Rust bootcamp content!