ENH: Re-introduce Qt resource support in Python

This commit re-introduces the support removed in c91fa78 (COMP: Remove
unused python-based Qt resource file).

It also ensures that the resources are available through Qt resource
system by importing the corresponding module.

This is particularly relevant when styling application through qss stylesheet
where icons can be referenced setting attribute like  the following:

  image: url(":/Icons/Image.svg");

The "Gears.png" icon is added only for the sake of testing the generation of
the python-based Qt resource file and may be removed after populating the
file.

Author: jcfr

{{cookiecutter.project_name}}/Modules/Scripted/Home/CMakeLists.txt

@@ -14,10 +14,14 @@ set(MODULE_PYTHON_RESOURCES
   Resources/Home.qss
   )
 
+slicerFunctionAddPythonQtResources(MODULE_PYTHON_QRC_RESOURCES
+  Resources/${MODULE_NAME}.qrc
+  )
+
 #-----------------------------------------------------------------------------
 slicerMacroBuildScriptedModule(
   NAME ${MODULE_NAME}
-  SCRIPTS ${MODULE_PYTHON_SCRIPTS}
+  SCRIPTS ${MODULE_PYTHON_SCRIPTS} ${MODULE_PYTHON_QRC_RESOURCES}
   RESOURCES ${MODULE_PYTHON_RESOURCES}
   )
 

{{cookiecutter.project_name}}/Modules/Scripted/Home/Home.py

@@ -10,6 +10,9 @@
 
 import SlicerCustomAppUtilities
 
+# Import to ensure the files are available through the Qt resource system
+from Resources import HomeResources
+
 
 class Home(ScriptedLoadableModule):
     """The home module allows to orchestrate and style the overall application workflow.

{{cookiecutter.project_name}}/Modules/Scripted/Home/Resources/Home.qrc

@@ -0,0 +1,13 @@
+<!DOCTYPE RCC>
+<!--
+  This file was automatically generated by genqrc.py ['./Icons/']
+  See http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/Developers/Build_system/Qt_resource_files for more information.
+-->
+
+<RCC version="1.0">
+
+  <qresource prefix="Icons">
+    <file alias="Gears.png">./Icons/Gears.png</file>
+  </qresource>
+
+</RCC>