add typedoc to package.json

## Use Case

to do refactoring it is useful to have a visualization of apis, classes and maybe call graphs

## Solution

typedoc can provide most of this. We can add it as devdependency and add a package.json script to generate the visualization for developer use. Doesn't need to be part of ci/cd.

## Alternatives

other doc generation tools? typedoc seems pretty good.