docs: add Table of Contents to README for better navigation

[SuryaGanesh284]

Description

This PR adds a comprehensive Table of Contents to the README.md file to improve document navigation and user experience.

Changes Made

• Added a new "📖 Table of Contents" section after the badges and before the main content
• Included links to all major sections:
  • About Revert
  • Why Revert?
  • Features (What makes us faster and reliable)
  • Quickstart (with sub-sections for Cloud and Self-hosted)
  • Architecture
  • Packages
  • Examples
  • Support
  • Security
  • Roadmap
  • Contributors

Benefits

• Easier navigation for users, especially on long README files
• Better discoverability of different sections
• Improved overall documentation structure
• Follows common open-source documentation best practices

Type of Change

• Documentation update
• Non-breaking change

[vercel]

@SuryaGanesh284 is attempting to deploy a commit to the jatinsandilya's projects Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

Thank you for following the naming conventions for pull request titles! 🙏