qtci_bin - qt creator integration - script that handles auto detect

At this screen, when user presses AutoDetect - it should call a script which autodetects stuff and validates tokens. The script should return relevant error code so that user can identify the real error reason. 

At this moment, 'qtci-create-config' does similar but does not return an error code. We either need to write this script as a wrapper or extend 'qtci-create-config' or 'qtci-config' to also be able to be called from Qt creator. 

We could also break the config script with multiple entry_points where the whole configuration can be broken into multiple steps. e.g 

1. qtci-read-project (to autodetect gitlab url, project path)
2. qtci-validate-config (to check that everything is allright)
3. qtci-save-config (to save everything with Qt creator or in env or in config file)

At this moment, we already have script that takes care of everything in one go. We need to break it apart in smaller modules or use different entry_points for the same script. 

FInally, we should have scripts that:

• start plugin
• kill plugin