Add: automated build system

[ColinM9991]

• Add: A build system that uses gulp (@ColinM9991).

When merged this pull request will: Add a gulp based build system that will create PBO files for each of the supported SQM files that exist in the /templates folder.

This does do a restructuring of the repository and it also deletes the BACKUP 7z file since that's what git is for (history).

Requires NodeJS

Usage:

npm install
npx gulp

[ColinM9991]

Closing this as I've actually just noticed there's a Python equivalent so it's unlikely this is required here.