added catch2 testing framework as submodule

CMakeLists.txt

@@ -42,6 +42,17 @@ add_subdirectory(libs/spdlog)
 add_subdirectory(libs/imgui)
 add_subdirectory(libs/imgui-node-editor)
 
+# 4. Catch2
+# Testing framework
+add_subdirectory(libs/catch2)
+# These tests can use the Catch2-provided main
+add_executable(tests SakuraVNE/test/test.cpp)
+target_link_libraries(tests PRIVATE Catch2::Catch2WithMain)
+
+# These tests need their own main
+# add_executable(custom-main-tests test.cpp test-main.cpp)
+# target_link_libraries(custom-main-tests PRIVATE Catch2::Catch2)
+
 # ------------------------------------------------------------------------------
 # SakuraVNE Executable Target
 # ------------------------------------------------------------------------------