Start: Recreate start as a QtWidgets-based app

Removes all Start network access and dependency on Chromium for rendering. Written
entirely in C++ (no HTML, CSS, JS, etc.).

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "tests/lib"]
 	path = tests/lib
 	url = https://github.com/google/googletest
+[submodule "src/3rdParty/GSL"]
+	path = src/3rdParty/GSL
+	url = https://github.com/microsoft/GSL

cMake/FreeCAD_Helpers/PrintFinalReport.cmake

@@ -88,11 +88,39 @@ macro(PrintFinalReport)
     value(FREECAD_CREATE_MAC_APP)
     value(FREECAD_USE_PYBIND11)
     value(FREECAD_USE_EXTERNAL_KDL)
+    value(BUILD_ADDONMGR)
+    value(BUILD_ARCH)
+    value(BUILD_ASSEMBLY)
+    value(BUILD_CLOUD)
+    value(BUILD_DRAFT)
+    value(BUILD_DRAWING)
     value(BUILD_FEM)
-    value(BUILD_WEB)
-    value(BUILD_GUI)
+    value(BUILD_HELP)
+    value(BUILD_IDF)
+    value(BUILD_IMPORT)
+    value(BUILD_INSPECTION)
+    value(BUILD_JTREADER)
+    value(BUILD_MATERIAL)
+    value(BUILD_MESH)
+    value(BUILD_MESH_PART)
+    value(BUILD_OPENSCAD)
+    value(BUILD_PART)
+    value(BUILD_PART_DESIGN)
+    value(BUILD_PATH)
+    value(BUILD_PLOT)
+    value(BUILD_POINTS)
+    value(BUILD_REVERSEENGINEERING)
+    value(BUILD_ROBOT)
+    value(BUILD_SANDBOX)
+    value(BUILD_SHOW)
+    value(BUILD_SKETCHER)
+    value(BUILD_SPREADSHEET)
     value(BUILD_START)
+    value(BUILD_SURFACE)
     value(BUILD_TECHDRAW)
+    value(BUILD_TEST)
+    value(BUILD_TUX)
+    value(BUILD_WEB)
     value(CMAKE_INSTALL_PREFIX)
     value(USE_CUDA)
     value(USE_OPENCV)

src/Gui/Icons/resource.qrc

@@ -12,6 +12,7 @@
         <file>list-add.svg</file>
         <file>freecad.svg</file>
         <file>freecad-doc.png</file>
+        <file>freecad-doc.svg</file>
         <file>bulb.svg</file>
         <file>TextDocument.svg</file>
         <file>button_down.svg</file>

src/Mod/Assembly/Gui/Resources/Assembly.qrc

@@ -16,5 +16,6 @@
         <file>panels/TaskAssemblyInsertLink.ui</file>
         <file>preferences/Assembly.ui</file>
         <file>icons/Assembly_CreateJointDistance.svg</file>
+        <file>icons/AssemblyWorkbench.svg</file>
     </qresource>
 </RCC>

src/Mod/CMakeLists.txt

@@ -10,6 +10,10 @@ if(BUILD_ASSEMBLY)
   add_subdirectory(Assembly)
 endif(BUILD_ASSEMBLY)
 
+if(BUILD_CLEANSTART)
+    add_subdirectory(CleanStart)
+endif(BUILD_CLEANSTART)
+
 if(BUILD_CLOUD)
     add_subdirectory(Cloud)
 endif(BUILD_CLOUD)

src/Mod/CleanStart/App/AppCleanStart.cpp

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/****************************************************************************
+ *                                                                          *
+#    Copyright (c) 2024 The FreeCAD Project Association AISBL               *
+ *                                                                          *
+ *   This file is part of FreeCAD.                                          *
+ *                                                                          *
+ *   FreeCAD is free software: you can redistribute it and/or modify it     *
+ *   under the terms of the GNU Lesser General Public License as            *
+ *   published by the Free Software Foundation, either version 2.1 of the   *
+ *   License, or (at your option) any later version.                        *
+ *                                                                          *
+ *   FreeCAD is distributed in the hope that it will be useful, but         *
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of             *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU       *
+ *   Lesser General Public License for more details.                        *
+ *                                                                          *
+ *   You should have received a copy of the GNU Lesser General Public       *
+ *   License along with FreeCAD. If not, see                                *
+ *   <https://www.gnu.org/licenses/>.                                       *
+ *                                                                          *
+ ***************************************************************************/
+
+#include "PreCompiled.h"
+
+#include <Base/Interpreter.h>
+#include <Base/Tools.h>
+#include <Base/Console.h>
+
+#include <Base/PyObjectBase.h>
+
+#include <3rdParty/GSL/include/gsl/pointers>
+
+namespace CleanStart
+{
+class Module: public Py::ExtensionModule<Module>
+{
+public:
+    Module()
+        : Py::ExtensionModule<Module>("CleanStart")
+    {
+        initialize("This module is the CleanStart module.");  // register with Python
+    }
+};
+
+PyObject* initModule()
+{
+    auto newModule = gsl::owner<Module *>(new Module);
+    return Base::Interpreter().addModule(newModule);  // Transfer ownership
+}
+
+}  // namespace CleanStart
+
+/* Python entry */
+PyMOD_INIT_FUNC(CleanStart)
+{
+    PyObject* mod = CleanStart::initModule();
+    Base::Console().Log("Loading CleanStart module... done\n");
+    PyMOD_Return(mod);
+}

src/Mod/CleanStart/App/CMakeLists.txt

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# /****************************************************************************
+#  *                                                                          *
+#  *   Copyright (c) 2024 The FreeCAD Project Association AISBL               *
+#  *                                                                          *
+#  *   This file is part of FreeCAD.                                          *
+#  *                                                                          *
+#  *   FreeCAD is free software: you can redistribute it and/or modify it     *
+#  *   under the terms of the GNU Lesser General Public License as            *
+#  *   published by the Free Software Foundation, either version 2.1 of the   *
+#  *   License, or (at your option) any later version.                        *
+#  *                                                                          *
+#  *   FreeCAD is distributed in the hope that it will be useful, but         *
+#  *   WITHOUT ANY WARRANTY; without even the implied warranty of             *
+#  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU       *
+#  *   Lesser General Public License for more details.                        *
+#  *                                                                          *
+#  *   You should have received a copy of the GNU Lesser General Public       *
+#  *   License along with FreeCAD. If not, see                                *
+#  *   <https://www.gnu.org/licenses/>.                                       *
+#  *                                                                          *
+#  ***************************************************************************/
+
+include_directories(
+        ${PYTHON_INCLUDE_DIRS}
+        ${QtCore_INCLUDE_DIRS}
+)
+
+set(CleanStart_LIBS
+        FreeCADApp
+        )
+
+SET(CleanStart_SRCS
+        AppCleanStart.cpp
+        DisplayedFilesModel.cpp
+        DisplayedFilesModel.h
+        ExamplesModel.cpp
+        ExamplesModel.h
+        PreCompiled.cpp
+        PreCompiled.h
+        RecentFilesModel.cpp
+        RecentFilesModel.h)
+
+add_library(CleanStart SHARED ${CleanStart_SRCS})
+target_link_libraries(CleanStart ${CleanStart_LIBS})
+
+SET_BIN_DIR(CleanStart CleanStart /Mod/CleanStart)
+SET_PYTHON_PREFIX_SUFFIX(CleanStart)
+
+INSTALL(TARGETS CleanStart DESTINATION ${CMAKE_INSTALL_LIBDIR})