feat: rewrite

[climba03003]

Resolves #118

TODO

• group the code that provide same feature as function
• split into multiple files for better management
• variables name to be consistence over the package and use full name
• add comments to explain the details
• remove .express
• remove .after
• split .ready and .start

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

Thanks for taking this on!

[climba03003]

Using Promise.try to simplify the codebase.
Removed .after and replace with .then.

Since we are using the Promise.try, some behavior is changed.

TODO List

• Add the toJSON and prettyPrint back.
• Add the test back.