File Copy Composer Plugin

Allows files to be copied on dependency installation, default composer behaviour only runs scripts for the root package.

Will only work on modules with skywire in the package name, will only work with paths relative to the working directory, e.g. dev instead of ./dev or ../../dev

Uses https://github.com/slowprog/CopyFile to copy files, see their documentation for configuration, only the extras.copy-files section is rquired