update message commane cli | add file header config

it's New configuration feature
this would alllow developer to controlled if he need to add file header
to translations or not
'fileHeader' => true // default Yii header String
'fileHeader' => false // no file header added
'fileHeader' => "string" // add this string to file header
Merge branch 'patch-3' of https://github.com/mbdwey/yii

* 'patch-3' of https://github.com/mbdwey/yii:
  update message commane cli | add file header config
refactored fileHeader property added by #3346