bug#47971: Improve Guix commands for update/upgrade

[bo0od <bo0od@riseup.net>]

Not really personal, Its about when there are new users these commands 
looks horrible.

You can call it personal when im saying use this X instead B while X and 
B has the same bad approach or both are good. This is called personal e.g:

use upgrade instead of distro-upgrade = yeah very much is something not 
really benefiting/different and personal.

but pull or update , reconfigure or system-upgrade...etc this is not 
anymore personal as i have already explained in my reasoning above.

Bone Baboon:
> bo0od writes:
>> The current commands used to make sure everything updated are not
>> friendly to type nor to memorize
> 
> The name of package management commands seems like it would largely be
> personal preference.
> 
> Each person using Guix could customize the commands to their own
> preferences using Bash aliases or an equivalent for the shell they are
> using.  For Bash refer to the Aliases section of it's info
> documentation.
> 
>> - pull -> update or refresh
>> - upgrade -> can be kept or package-upgrade
>> - reconfigure /etc/config.scm -> dist-upgrade or distro-upgrade or
>>    system-upgrade
> 
> For command names there are many package managers that you can look to
> for inspiration. Here are some examples:
> 
> * Gentoo - emerge
> * OpenBSD - pkg
> * Void - xbps
> * Alpine - apk
> * Debian - apt
> * Arch - pacam or paru
> * Fedora - dnf
> 
>> OR There is another approach some distros taking which is using
>> shortcuts to only letters e.g
>>
>> pull -> p or -p
>> upgrade -> u or -u
>> reconfigure -> re or -re
> 
> This could also be done with shell aliases.
>