Change the way rules are listed from command line (#2940

[ssbarnea]

• rename plain formatting to brief
• make brief implicit formatting for rule listing
• rename rich formatting to full

$ ansible-lint -L

args                        Validating module arguments. (syntax, experimental)
avoid-implicit              Avoid implicit behaviors (unpredictability, experimental)
command-instead-of-module   Using command rather than module. (command-shell, idiom)
command-instead-of-shell    Use shell only when shell functionality is required. (command-shell, idiom)
deprecated-bare-vars        Using bare variables is deprecated. (deprecations)
...