Comprehensive README Overhaul for SWoC'26 Onboarding

[Nitya-003]

Description:

Is your documentation request related to a problem?
Yes. While the current README provides a great overview of the Code A2Z ecosystem, it lacks the visual hierarchy and scannability required for a high-traffic open-source event like Social Winter of Code (SWoC) 2026. The feature checklist is extensive but needs better categorization to help contributors find their niche (Frontend/Backend/AI) quickly.

Proposed Enhancements

• I propose a complete revamp of the README.md to improve the developer experience and project visibility.
• Modern Branding: Add high-quality GitHub badges (License, Tech Stack, SWoC '26 status, Discord, and PRs welcome).
• Architecture Visualization: Add a Mermaid.js diagram explaining the interaction between React+Vite, Jotai State Management, and the Node/Express backend.
• Categorized Features: Group the current "Feature Checklist" into logical modules (e.g., Core Infrastructure, AI & Automation, Social & Gamification) using collapsible
  Details

  tags.
• Quick-Start Shields: Create a "Choose your path" section (Frontend-only setup vs Full-stack setup) with clear, highlighted command blocks.
• Modular Structure Map: Provide a visual map of /client/src/modules and /server/src/routes to enforce the structural consistency mentioned in the tips.
• Gamification & SWoC Branding: Dedicated section for SWoC '26 contributors with labels guidance.

Why is this needed?

For a project that aims to be a "unified space for developers," the documentation must be the gold standard. A professional README will:

• Reduce onboarding time for new contributors.
• Highlight the project's complexity (Jotai, Resend, AI tools) to attract high-skilled developers.
• Properly credit the community through an automated contributors' wall.

Checklist:

• I have checked if a similar documentation issue already exists.
• I have a clear vision for the structural layout.
• I will include the SWoC'26 branding.

Labels to add:
documentation enhancement SWoC'26

[github-actions]

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[Avdhesh-Varshney]

Hi @Nitya-003
Please focus on feature development or task completion in this repo.
No need to raise documentation issues.