Improve unit testing directory structure

Separate Qt tests and gtest tests
Add a basic shadow of the project structure
Add a few simple tests to demonstrate usage

tests/src/Base/Builder3D.cpp

@@ -0,0 +1,8 @@
+#include "gtest/gtest.h"
+
+#include <QString>
+#include "Base/Builder3D.h"
+
+TEST(Builder, one){
+    QString ss{};
+}