refactor: Implement Rectangle tool with snapping and dimensions

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

src/ApplicationController.cpp

@@ -2,6 +2,7 @@
 #include "Document.h"
 #include "SketchFeature.h"
 #include "SketchLine.h"
+#include "SketchRectangle.h"
 #include "MainWindow.h"
 
 #include <QInputDialog>
@@ -140,6 +141,13 @@ void ApplicationController::addLine(const gp_Pnt& start, const gp_Pnt& end)
     }
 }
 
+void ApplicationController::addRectangle(const gp_Pnt& corner1, const gp_Pnt& corner2)
+{
+    if (m_activeSketch) {
+        m_activeSketch->addObject(new SketchRectangle(corner1, corner2));
+    }
+}
+
 void ApplicationController::endSketch()
 {
     m_activeSketch = nullptr;