Move "FileReaper" from hackport to its own library

Which part would be affected

The recent modifications from hackport

Description of the feature

Should be migred into its own file to allow easy use by other exploit scripts

How would it enhance the experience?

Potential enhancements/fixes would be automatically applied to all scripts thanks to preprocessor.gs

Checks to do

• Hackport still working as intended
• (Outside repo) Laplonge must update his personal tool to use the new format