Update index.js - KCD_Xbox_Support - IDs, executable, and requiresLauncher

[ChemGuy1611]

Added Xbox version support and enhanced executable and requiresLauncher functions.

Goes with #157

[IDCs]

Hi @ChemGuy1611, thanks for your PR - I'm afraid that I can't merge this in as the .js files are generated when compiling the .ts files. In order to compile the files, you're going to need the typescript node module - internally we always compile the typescript games alongside the Vortex build which gives us access to that module, but it also regenerates the .js files which will overwrite your changes every time we create a new Vortex build.

I suggest trying to build Vortex on your machine so that you're able to compile the typescript game extensions, and make your changes to the .ts files instead.

(this overcomplicated build process for this repo is partially the reason why we don't accept new additions anymore)

Alternatively, you can make the changes to the .ts files and I'll compile them before merging them in.