feat(create): add C++ module scaffold with App/ and Gui/ targets (#251)

Establish build infrastructure for Kindred-specific C++ features:

- CreateGlobal.h: export macros (CreateExport, CreateGuiExport)
- App/: CreateApp shared library (PyMOD_INIT_FUNC, Py::ExtensionModule)
- Gui/: CreateGui shared library (links CreateApp + FreeCADGui)
- CMakeLists.txt: add_subdirectory(App) + conditional add_subdirectory(Gui)

Scaffold only — no features. Follows the Assembly module pattern.
Existing Python Init.py/InitGui.py bootstrap unchanged.

src/Mod/Create/App/AppCreate.cpp

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#include <Base/Console.h>
+#include <Base/PyObjectBase.h>
+
+
+namespace Create
+{
+extern PyObject* initModule();
+}
+
+/* Python entry */
+PyMOD_INIT_FUNC(CreateApp)
+{
+    PyObject* mod = Create::initModule();
+    Base::Console().log("Loading Create module... done\n");
+
+    // Future: Create::FeatureFlipPocket::init(); etc.
+
+    PyMOD_Return(mod);
+}

src/Mod/Create/App/AppCreatePy.cpp

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#include <Base/Interpreter.h>
+
+
+namespace Create
+{
+class Module: public Py::ExtensionModule<Module>
+{
+public:
+    Module()
+        : Py::ExtensionModule<Module>("CreateApp")
+    {
+        initialize("Kindred Create module.");
+    }
+};
+
+PyObject* initModule()
+{
+    return Base::Interpreter().addModule(new Module);
+}
+
+}  // namespace Create

src/Mod/Create/App/CMakeLists.txt

@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+set(Create_LIBS
+    FreeCADApp
+)
+
+SET(Module_SRCS
+    AppCreate.cpp
+    AppCreatePy.cpp
+    PreCompiled.h
+)
+SOURCE_GROUP("Module" FILES ${Module_SRCS})
+
+SET(Create_SRCS
+    ${Module_SRCS}
+)
+
+add_library(Create SHARED ${Create_SRCS})
+target_include_directories(Create PRIVATE
+    ${CMAKE_BINARY_DIR}
+    ${CMAKE_SOURCE_DIR}/src
+    ${CMAKE_BINARY_DIR}/src
+    ${CMAKE_CURRENT_BINARY_DIR}
+)
+target_link_libraries(Create ${Create_LIBS})
+
+if(FREECAD_USE_PCH)
+    target_precompile_headers(Create PRIVATE
+        $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">)
+endif()
+
+SET_BIN_DIR(Create CreateApp /Mod/Create)
+SET_PYTHON_PREFIX_SUFFIX(Create)
+
+INSTALL(TARGETS Create DESTINATION ${CMAKE_INSTALL_LIBDIR})

src/Mod/Create/App/PreCompiled.h

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#ifndef CREATE_PRECOMPILED_H
+#define CREATE_PRECOMPILED_H
+
+#include <FCConfig.h>
+
+#include <string>
+#include <vector>
+
+#endif  // CREATE_PRECOMPILED_H

src/Mod/Create/CMakeLists.txt

@@ -1,6 +1,13 @@
 # Kindred Create core module
 # Handles auto-loading of ztools and Silo addons
 
+# C++ module targets
+add_subdirectory(App)
+
+if(BUILD_GUI)
+    add_subdirectory(Gui)
+endif(BUILD_GUI)
+
 # Generate version.py from template with Kindred Create version
 configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/version.py.in

src/Mod/Create/CreateGlobal.h

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#include <FCGlobal.h>
+
+#ifndef CREATE_GLOBAL_H
+#define CREATE_GLOBAL_H
+
+// CreateApp
+#ifndef CreateExport
+# ifdef Create_EXPORTS
+#  define CreateExport FREECAD_DECL_EXPORT
+# else
+#  define CreateExport FREECAD_DECL_IMPORT
+# endif
+#endif
+
+// CreateGui
+#ifndef CreateGuiExport
+# ifdef CreateGui_EXPORTS
+#  define CreateGuiExport FREECAD_DECL_EXPORT
+# else
+#  define CreateGuiExport FREECAD_DECL_IMPORT
+# endif
+#endif
+
+#endif  // CREATE_GLOBAL_H

src/Mod/Create/Gui/AppCreateGui.cpp

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#include <Base/Console.h>
+#include <Base/PyObjectBase.h>
+
+
+namespace CreateGui
+{
+extern PyObject* initModule();
+}
+
+/* Python entry */
+PyMOD_INIT_FUNC(CreateGui)
+{
+    PyObject* mod = CreateGui::initModule();
+    Base::Console().log("Loading CreateGui module... done\n");
+
+    // Future: CreateGui::ViewProviderFlipPocket::init(); etc.
+
+    PyMOD_Return(mod);
+}

src/Mod/Create/Gui/AppCreateGuiPy.cpp

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#include <Base/Interpreter.h>
+
+
+namespace CreateGui
+{
+class Module: public Py::ExtensionModule<Module>
+{
+public:
+    Module()
+        : Py::ExtensionModule<Module>("CreateGui")
+    {
+        initialize("Kindred Create GUI module.");
+    }
+};
+
+PyObject* initModule()
+{
+    return Base::Interpreter().addModule(new Module);
+}
+
+}  // namespace CreateGui

src/Mod/Create/Gui/CMakeLists.txt

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+set(CreateGui_LIBS
+    Create
+    FreeCADGui
+)
+
+SET(Module_SRCS
+    AppCreateGui.cpp
+    AppCreateGuiPy.cpp
+    PreCompiled.h
+)
+SOURCE_GROUP("Module" FILES ${Module_SRCS})
+
+SET(CreateGui_SRCS
+    ${Module_SRCS}
+)
+
+add_library(CreateGui SHARED ${CreateGui_SRCS})
+target_include_directories(CreateGui PRIVATE
+    ${CMAKE_BINARY_DIR}
+    ${CMAKE_CURRENT_BINARY_DIR}
+)
+target_link_libraries(CreateGui ${CreateGui_LIBS})
+
+if(FREECAD_USE_PCH)
+    target_precompile_headers(CreateGui PRIVATE
+        $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">)
+endif()
+
+SET_BIN_DIR(CreateGui CreateGui /Mod/Create)
+SET_PYTHON_PREFIX_SUFFIX(CreateGui)
+
+INSTALL(TARGETS CreateGui DESTINATION ${CMAKE_INSTALL_LIBDIR})

src/Mod/Create/Gui/PreCompiled.h

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#ifndef CREATEGUI_PRECOMPILED_H
+#define CREATEGUI_PRECOMPILED_H
+
+#include <FCConfig.h>
+
+#include <string>
+
+#include <Gui/QtAll.h>
+
+#endif  // CREATEGUI_PRECOMPILED_H