Standardize and modernize font_sharpener: new script interface, robust backup, EN/RU docs, and CI#1

cto-new[bot] wants to merge 1 commit intomainnagual2/font_sharpener:mainfrom

feat-font-sharpener-rename-add-en-ru-readme-hardening-cinagual2/font_sharpener:feat-font-sharpener-rename-add-en-ru-readme-hardening-ciCopy head branch name to clipboard