Base: fix Matrix4D::hasScale

* If all column vectors of the 3x3 sub-matrix are equal the function incorrectly claims that it's uniform scaling.
* Detect also non-uniform scaling and if was applied from the left or right side
* Replace the int with an enum and expose it to Python
* Add several new unit tests

src/Mod/Part/App/TopoShape.cpp

@@ -4297,7 +4297,8 @@ bool TopoShape::_makETransform(const TopoShape &shape,
         const Base::Matrix4D &rclTrf, const char *op, bool checkScale, bool copy)
 {
     if(checkScale) {
-        if(rclTrf.hasScale()<0) {
+        auto type = rclTrf.hasScale();
+        if (type != Base::ScaleType::Uniform && type != Base::ScaleType::NoScaling) {
             makEGTransform(shape,rclTrf,op,copy);
             return true;
         }