clean up visual studio files and add root cmake

examples/knxPython/pybind11/tests/test_embed/external_module.cpp

@@ -1,23 +0,0 @@
-#include <pybind11/pybind11.h>
-
-namespace py = pybind11;
-
-/* Simple test module/test class to check that the referenced internals data of external pybind11
- * modules aren't preserved over a finalize/initialize.
- */
-
-PYBIND11_MODULE(external_module, m) {
-    class A {
-    public:
-        A(int value) : v{value} {};
-        int v;
-    };
-
-    py::class_<A>(m, "A")
-        .def(py::init<int>())
-        .def_readwrite("value", &A::v);
-
-    m.def("internals_at", []() {
-        return reinterpret_cast<uintptr_t>(&py::detail::get_internals());
-    });
-}