Add wxwidgets module with initial implementation and integrate into CMake build system. Improve asset management in sfml module.

cpp/wxwidgets/CMakeLists.txt

@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 4.1)
+project(wxwidgets LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+
+find_package(wxWidgets REQUIRED COMPONENTS net core base)
+if(wxWidgets_USE_FILE)
+    include(${wxWidgets_USE_FILE})
+endif()
+
+add_executable(wxwidgets src/main.cpp)
+target_link_libraries(wxwidgets ${wxWidgets_LIBRARIES})