So now the "Applciation Output" can distinguish between these four, and
handle them appropriately.

By introducing the OutputFormatter, RunControls can influence the formatting
depening on the application started. A nice (and intended) side-effect is that
the QML runtime specific formatting will not interfere anymore with anything
else.

Renamed RunConfiguration::configurationWidget to
createConfigurationWidget.

Reviewed-by: dt

It's not yet possible to attach to an external app running a qml
debugging server, because the server is only started on startup if an
env variable is set. Changing this requires action from Brisbane, but
even the current solution works for C++ apps with QML in them.

Task-number: BAUHAUS-585
Reviewed-by: dt

All files have been renamed from Qml to QDeclarative.
Registration of types is now done in an initializer method.

Moved Qt Designer to open from Design Mode. Also, Design mode is now global,
and created in coreplugin. Other plugins can register themselves to it.

Putting every class in it's own files + avoid "using namespace"