Sketcher: SketchObject new addGeometry method for smart pointers

================================================================

This new facility avoids to have to create a new copy() when a user copy is already created.

As the user copy is reused via move semantics, memory management is simplified.

CAVEAT: When this facility is used, the client code has to ensure whether a copy() or a clone() of the Part::Geometry
should be undertaken. The different between both is that the former creates a new uuid (tag), whereas the latter does not.

src/Mod/Sketcher/App/SketchObject.cpp

@@ -886,6 +886,14 @@ int SketchObject::addGeometry(const std::vector<Part::Geometry *> &geoList, bool
 }
 
 int SketchObject::addGeometry(const Part::Geometry *geo, bool construction/*=false*/)
+{
+    // this copy has a new random tag (see copy() vs clone())
+    auto geoNew = std::unique_ptr<Part::Geometry>(geo->copy());
+
+    return addGeometry(std::move(geoNew),construction);
+}
+
+int SketchObject::addGeometry(std::unique_ptr<Part::Geometry> newgeo, bool construction/*=false*/)
 {
     Base::StateLocker lock(managedoperation, true); // no need to check input data validity as this is an sketchobject managed operation.
 
@@ -893,7 +901,7 @@ int SketchObject::addGeometry(const Part::Geometry *geo, bool construction/*=fal
 
     std::vector< Part::Geometry * > newVals(vals);
 
-    Part::Geometry *geoNew = geo->copy();
+    auto *geoNew = newgeo.release();
 
     if( geoNew->getTypeId() == Part::GeomPoint::getClassTypeId()) {
         // creation mode for points is always construction not to

src/Mod/Sketcher/App/SketchObject.h

@@ -94,12 +94,23 @@ public:
      */
     bool isSupportedGeometry(const Part::Geometry *geo) const;
     /*!
-     \brief Add geometry to a sketch
+     \brief Add geometry to a sketch - It adds a copy with a different uuid (internally uses copy() instead of clone())
      \param geo - geometry to add
      \param construction - true for construction lines
      \retval int - GeoId of added element
      */
     int addGeometry(const Part::Geometry *geo, bool construction=false);
+
+    /*!
+     \brief Add geometry to a sketch using up the provided newgeo. Caveat: It will use the provided newgeo with the uuid it has.
+     This is different from the addGeometry method with a naked pointer, where a different uuid is ensured. The caller is responsible
+     for provided a new or existing uuid, as necessary.
+     \param geo - geometry to add
+     \param construction - true for construction lines
+     \retval int - GeoId of added element
+     */
+    int addGeometry(std::unique_ptr<Part::Geometry> newgeo, bool construction=false);
+
     /*!
      \brief Add multiple geometry elements to a sketch
      \param geoList - geometry to add