docs: improve readme

[paulaxisabel]

Description

Add badges and sections summarizing the contributing guidelines, code of conduct, and license to the project's README.

Type of change

• [x] This change requires a documentation update.

Checklist

• [x] My code follows the style guidelines of this project.
• [x] I have made corresponding changes to the documentation.

Screenshots

Notes to reviewers

Happy Hacktoberfest!

[jofftiquez]

This is great! Thanks @paulaxisabel