Kaiju Engine (issue #14) - Setup new project creation code

Setup of the template project. Added code for copying it over to the target project directory. Also added helper file/folder copy functions for the engine. I've updated the launch json to support the editor tag. Lastly I've created a build go "scripts" folder for doing offline tooling via go run.

https://github.com/KaijuEngine/kaiju/pull/27