ProjectExplorer: Add RunConfigFactory::addRunWorkerFactory convienience

There is a recurring special case that certain run controls depend
on the presence of specific RunConfiguration (which in turn has
it's own restriction on e.g. target or project types) but have no
further restrictions.

Make it easy to handle that case.

Change-Id: I2e86f366591b02003f720dcc00b4c52bb2f34e00
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/nim/project/nimrunconfiguration.cpp

@@ -101,6 +101,7 @@ NimRunConfigurationFactory::NimRunConfigurationFactory() : FixedRunConfiguration
 {
     registerRunConfiguration<NimRunConfiguration>("Nim.NimRunConfiguration");
     addSupportedProjectType(Constants::C_NIMPROJECT_ID);
+    addRunWorkerFactory<SimpleTargetRunner>(ProjectExplorer::Constants::NORMAL_RUN_MODE);
 }
 
 } // Nim