Feature Request - Ability to Exclude Files in backup:backup Command

[wwidergoldbsc]

I have encountered a scenario where I need the ability to exclude specific files from the backup. I would like to propose the addition of a feature to the backup:backup command that allows users to specify files or directories to be excluded from the backup process.
I suggest introducing a new option or configuration parameter for the backup:backup command, such as --exclude or a configuration file where users can specify patterns or paths to be excluded from the backup.

Example Usage:

bin/console backup:backup --exclude=var/config/,public/

This example command would create a backup while excluding the specified directories (var/config/ and public/).