* Add robust package and repository management helpers
Introduces unified helper functions for package installation, repository management, and legacy cleanup across Debian/Ubuntu upgrades. Adds retry logic for APT operations, keyring cleanup, service management, version checks, and tool-specific repository setup. Refactors setup functions for Composer, FFmpeg, Go, Ghostscript, ImageMagick, Java, hardware acceleration, and MariaDB to use new helpers, improving reliability and upgrade safety.
* english comment