Introduce contribution guidelines #188
Description
The current README.md references a non-existent document for contribution guidelines. To address this, we need to create a comprehensive document on contribution guidelines inspired by the best practices observed in contribution guidelines of other kotlinx libraries.
This document should cover, but not be limited to:
- How to set up the development environment
- Step-by-step instructions for submitting contributions
- Code style and conventions to follow
- A detailed section on how to build the project, including any prerequisites and common troubleshooting steps.