The readme is changed to make it easily accessible and also improves Readability / Branding

[ArmaanBawa]

Summary

This PR improves the visual design and readability of the main README file by introducing Kotlin-themed UI enhancements, clearer structure, and accessibility-friendly formatting. No functional or code-related changes have been made.

Motivation

The previous README content was correct but visually dense. These enhancements help:

• Improve first-time contributor experience
• Make information more discoverable
• Align the documentation style with Kotlin branding and friendliness

Changes Included

• Added emoji section headers for better visual hierarchy
• Improved formatting, spacing, and readability across all major sections
• Retained all original information and link references
• Enhanced developer-focused sections with clear call-to-action styling

Notes

• Documentation-only change
• No effect on build, CI, or source code
• Safe to merge