Add CONTRIBUTING.md and CODE_OF_CONDUCT.md guidelines

[tajobe]

🚀 Description

Add contributor guidelines via CONTRIBUTING and CODE_OF_CONDUCT markdown files

📄 Motivation and Context

Add guidelines to the open source project for any potential contributors to have a starting point.

🧪 How Has This Been Tested?

N/A, docs update

📦 Types of changes

Project/Meta

✅ Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[github-actions]

Test Results

1 tests  ±0   1 ✅ ±0   2s ⏱️ -2s
1 suites ±0   0 💤 ±0 
1 files   ±0   0 ❌ ±0 

Results for commit 1a8edf0. ± Comparison against base commit e13f89d.