Improve "scoop alias list" output (#2160)

[r15ch13]

See: #2160

Example output:

λ scoop alias list

i       scoop install
test    composer install
u       scoop uninstall
upgrade scoop update *

λ scoop alias list -v

Name    Command          Summary
----    -------          -------
i       scoop install
test    composer install Run composer install in current directory
u       scoop uninstall
upgrade scoop update *   Updates all apps like brew or apt

[brandon93s]

Nice!