build: Automate source file discovery for C++ sources in src/

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

CMakeLists.txt

@@ -28,24 +28,10 @@ endif()
 message(STATUS "OpenCASCADE_INCLUDE_DIRS: ${OpenCASCADE_INCLUDE_DIRS}")
 message(STATUS "OpenCASCADE_LIBRARIES: ${OpenCASCADE_LIBRARIES}")
 
+file(GLOB SOURCES "src/*.cpp")
+
 add_executable(OpenCAD
-    src/main.cpp
-    src/MainWindow.cpp
-    src/ViewportWidget.cpp
-    src/ViewCube.cpp
-    src/SketchGrid.cpp
-    src/Document.cpp
-    src/Feature.cpp
-    src/SketchFeature.cpp
-    src/SketchLine.cpp
-    src/SketchRectangle.cpp
-    src/FeatureBrowser.cpp
-	src/ApplicationController.cpp
-	src/Camera.cpp
-	src/SketchTool.cpp
-	src/LineTool.cpp
-	src/RectangleTool.cpp
-	src/Snapping.cpp
+    ${SOURCES}
     resources.qrc
 )