Displayed fields should be selectable

[karibou]

Description

When listing information like in :

scw instance server list

There should be an option to restrict which fields are displayed

How this functionality would be exposed

scw instance server list -f "%id,%name,%type,%creation_date,%public_ip"

## References

## Version

version     2.0.0-beta.4
build-date  2020-06-08T03:33:48PM
go-version  go1.14.3
git-branch  new-release
git-commit  620ac25e
go-arch     amd64
go-os       linux

[jerome-quere]

Fixed by #1158