[Feature] make the app available as vscode extension

[chris-kruining]

The goal is to integrate with development, so logically running right inside vscode (and perhaps other editors as well) seems logical to me.

What I likely want to do is to split up the current project into a core and standalone/web project. that way I can turn the actual features of the app into a library. and have multiple front-ends/UIs that can be added. of which vscode would just be one.

This however is a bit more then just a minor refactor. so not anytime soon I recon.