docs: Create comprehensive README.md documentation

[plasma-ai]

Summary

This PR adds a comprehensive README.md file to the project with complete documentation following the approved plan.

Changes Made

• Project Overview: Added detailed description of is-cod.in and its mission
• Features Section: Highlighted key features and capabilities
• Installation Guide: Step-by-step instructions for local development
• Usage Documentation: Separate guides for users and contributors
• Project Structure: Clear visualization of directory structure
• Technology Stack: Detailed breakdown of technologies used
• Registration Process: Complete guide for subdomain registration
• Contributing Guidelines: Workflow, code style, and commit conventions
• Team Section: Documented all team members and their roles
• Support & FAQ: Contact information and frequently asked questions
• Professional Formatting: Added badges, table of contents, and proper markdown structure

Documentation Sections

1. About
2. Features
3. Live Demo
4. Getting Started (Prerequisites, Installation, Local Development)
5. Usage (For Users & Contributors)
6. Project Structure
7. Technology Stack
8. Registration Process
9. Contributing (Workflow, Code Style, Commit Conventions)
10. Team
11. License
12. Support (Contact & FAQ)
13. Acknowledgments

Benefits

• Helps new users understand how to use the service
• Makes it easier for contributors to get started
• Provides clear guidelines for project participation
• Improves project professionalism and discoverability
• Serves as single source of truth for project information

Test Plan

• README renders correctly on GitHub
• All internal links work properly
• External links are valid
• Code blocks are properly formatted
• Markdown syntax is correct
• Information is accurate and up-to-date