feat: add mock_file_check_guard() for scope-based cleanup#96

atoomic merged 1 commit intocpan-authors:maincpan-authors/Overload-FileCheck:mainfrom

Koan-Bot:koan.atoomic/add-mock-file-check-guardKoan-Bot/Overload-FileCheck:koan.atoomic/add-mock-file-check-guardCopy head branch name to clipboard