feat(docs): add code of conduct, contributing and revise README info

[wingkwong]

📝 Description

@jrgarciadev please help create discussion in this repo.

✅ Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Refactoring (improve a current implementation without adding a new feature or fixing a bug)
• [ ] Improvement (non-breaking change which improves an existing feature)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation update

[winchesHe]

Amazing job @wingkwong 🚀