Implement mark command

[mcurlej]

Command: mark

dnf mark install <package-spec>...

Marks the specified packages as installed by user. This can be useful if any package was installed as a dependency and is desired to stay on the system when Autoremove Command or Remove Command along with clean_requirements_on_remove configuration option set to True is executed.

dnf mark remove <package-spec>...

Unmarks the specified packages as installed by user. Whenever you as a user don’t need a specific package you can mark it for removal. The package stays installed on the system but will be removed when Autoremove Command or Remove Command along with clean_requirements_on_remove configuration option set to True is executed. You should use this operation instead of Remove Command if you’re not sure whether the package is a requirement of other user installed packages on the system.

dnf mark group <package-spec>...

Marks the specified packages as installed by group. This can be useful if any package was installed as a dependency or a user and is desired to be protected and handled as a group member like during group remove.

[j-mracek]

I believe the command is completely implemented

[glum23]

Note: the description of this issue is significantly different from the current implementation of dnf5 mark. It is not properly documented yet, see #940 . Also, 'dnf5 mark group' does not work as expected, see #935 .