Examples should use the latest node-insim from src folder

[mkapal]

The projects in the examples/ folder use node-insim as an NPM dependency. This means that if there is a breaking change in Node InSim API, the examples won't use the new version until it's officially released on NPM.

For quicker testability, remove package.json and lock files from the example folders and use node-insim from the src/ folder instead, like it's done with the playground/ folder.