[feature] `gis status` in one line

[nqminhuit]

Add new flag for gis status: --show-dirty-only which show a quick glance at what repo has changed. Mockup:

original gis status:

small-git-root-module
  ## master...origin/master
small-git-api
  ## master...origin/master
  R. text-3 -> text-03
  MM text-1
  .M text-2
   ? newFile
small-git-schema
  ## master...origin/master [ahead 1, behind 2]
  .M text-14
small-git-shared
  ## master...origin/master [ahead 1]
small-git-craft
  ## master...origin/master
small-git-domain
  ## master...origin/master
small-git-app
  ## master...origin/master
studious-eureka
  ## master...origin/master [behind 1]
  M. text-44
fantastic-octo-chainsaw
  ## master...origin/master
literate-octo-invention
  ## master...origin/master
silver-tribble
  ## master...origin/master
   ? projectilessssss

expected (experiment):

[nqminhuit]

fixes #40