Simplify and streamline README documentation

[MarcosBrendonDePaula]

Summary

This PR significantly simplifies the README.md by removing excessive marketing language, redundant sections, and visual clutter while preserving all essential information for developers. The new structure is more scannable and focuses on practical getting-started guidance and technical reference.

Key Changes

• Removed marketing-heavy sections: Eliminated decorative headers, emoji-heavy formatting, and comparison tables that don't add practical value
• Consolidated tech stack information: Merged scattered technology descriptions into a single, clean reference table
• Simplified project structure: Replaced verbose descriptions with a concise directory tree with inline comments
• Streamlined feature documentation: Condensed feature descriptions while keeping code examples for End-to-End Type Safety, Live Components, and Room System
• Reorganized scripts section: Converted from table format to simple bash code block for easier copying
• Cleaned up environment variables: Replaced lengthy prose with a focused reference table
• Removed redundant sections: Eliminated duplicate information about Bun installation, requirements, and acknowledgments
• Improved navigation: Kept documentation links but removed excessive cross-references and badges

Notable Details

• Preserved all critical information: Quick Start, Tech Stack, Project Structure, Features, Scripts, Environment Variables, Docker, Requirements, and Documentation links
• Maintained code examples for key features (Eden Treaty type safety, Live Components, Room System, Declarative Configuration, Plugin System)
• Kept the LLM-optimized documentation reference (LLMD/) as it's valuable for AI-assisted development
• Reduced file from ~600 lines to ~300 lines while maintaining completeness
• Improved readability with consistent formatting and clearer section hierarchy

https://claude.ai/code/session_01NJPg94vsJtb2mBw76d16FH