Help the user writing use-statements themself

[addiks]

Currently the plugin does not provide any help when writing the use-statement manually. The planned workflow is that the plugin will add the whole use-statement automatically when auto-completing a class-name in the code. This is problematic for new users because they often do not know this planned workflow, try to write the use-statements manually and get frustrated at the plugin because it does not help the user at that point.

To fix that the plugin should detect when a user wants to write a use-statement manually and provide helpful auto-completion for that.