Enhance testing framework and UI integration for YAZE

- Added a comprehensive testing framework with support for unit, integration, and UI tests, improving overall test coverage and reliability.
- Integrated ImGui Test Engine for UI testing, allowing for real-time feedback and visualization of test results.
- Updated CMake configuration to conditionally include testing components based on build options, enhancing flexibility for developers.
- Introduced a new command in the CLI for running asset loading tests on ROMs, providing a straightforward way to validate functionality.
- Enhanced error handling and resource management during testing, ensuring stability and clarity in test execution.
- Improved user interface with a dedicated test dashboard for monitoring test progress and results, enhancing developer experience.

src/app/app.cmake

@@ -69,9 +69,17 @@ target_link_libraries(
   ${SDL_TARGETS}
   ${CMAKE_DL_LIBS}
   ImGui
-  ImGuiTestEngine
 )
 
+# Conditionally link ImGui Test Engine
+if(YAZE_ENABLE_UI_TESTS AND TARGET ImGuiTestEngine)
+  target_include_directories(yaze PUBLIC ${CMAKE_SOURCE_DIR}/src/lib/imgui_test_engine)
+  target_link_libraries(yaze PUBLIC ${IMGUI_TEST_ENGINE_TARGET})
+  target_compile_definitions(yaze PRIVATE YAZE_ENABLE_IMGUI_TEST_ENGINE=1)
+else()
+  target_compile_definitions(yaze PRIVATE YAZE_ENABLE_IMGUI_TEST_ENGINE=0)
+endif()
+
 # Conditionally link PNG if available
 if(PNG_FOUND)
   target_link_libraries(yaze PUBLIC ${PNG_LIBRARIES})