[feature] Add Typescript definition files (.d.ts)

[ngarbezza]

Is your feature request related to a problem? Please describe.

It would be nice to use this tool with Typescript as well.

Describe the solution you'd like

As far as I understood, we can create definition files (.d.ts) bundled with the NPM package and allow Typescript to detect types from the library's public interface.

The goal is to investigate if this is a viable solution and add it to the package.

Describe alternatives you've considered

None