RetryMaster Alpha 0.2.1: Documentation

⚠️ WARNING: This is a work in progress. API may not be stable and methods can change at any time. Use at your own risk!

What's Changed

• Improve README.md Badges by @IlicMiljan in #5
• Adopt CONTRIBUTING.md by @IlicMiljan in #7
• Adopt Code of Conduct by @IlicMiljan in #6
• Adopt Issue Templates by @IlicMiljan in #8
• Create Pull Request Template by @IlicMiljan in #9
• Create SECURITY.md by @IlicMiljan in #10