Feature: skip paths during the backup process

__Review thread__: work in progress

# TODO

* Print to log for debugging
* Test on example codebase

# Changes

* Accepts array of paths to remove from the backup copy
* Aims to prevent accidental deletion of paths outside of the backup
* README updated for new feature

# Testing

* Give it a risky path (leading slash or periods)
* Set configurations that violate type expectations