Documentation & Refactoring

What's Changed

• Documentation & refactoring
• Bump actions/checkout from 2 to 3 by @dependabot in #3
• Bump actions/setup-java from 1 to 3 by @dependabot in #4

New Contributors

• @dependabot made their first contribution in #3

Full Changelog: https://github.com/FrenkyDema/sunmi_cloud_printer/commits/v0.0.5