Migrate to TypeScript and JavaScript-Demo Environment

[CMCDragonkai]

The JavaScript demo environment has a typescript branch: https://github.com/MatrixAI/JavaScript-Demo/tree/typescript

We intend to migrate our projects to this, except for the ones that have reached stability like js-virtualfs.

But all the other polykey projects are going to be migrated over as well.

So there are 2 aims here:

1. Start using typescript + webpack
2. Use the same Nix structure as JS demo

Make sure that all tests have been migrated as well to Jest.

[CMCDragonkai]

Notice the assignments and the projects. Make sure that issues are organized as part of the company level project board.

We are going to do the same as we do in Gitlab. With the board being used as a pipeline. But with other labels representing categorisation.