[7.2] Story: Create CONTRIBUTING.md

[adriancofie]

Description

Document the process for contributing to the library.

Parent Issue: #EPIC_7

Sub-Tasks

• Write development setup instructions
• Document component creation workflow
• Specify testing requirements
• Document PR process and checklist
• Add code review guidelines
• Specify commit message conventions (Conventional Commits)
• Document changeset creation process

Notes

• Clear contribution guidelines encourage participation