CMake/project reorg

CMakeLists.txt

@@ -20,8 +20,20 @@ set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
 set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
 set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
 
-add_library(NBEvents ./src/NBEvents/Events.cpp)
+set(BUILD_TESTS)
 
-add_subdirectory(./src/NBCoreUtils)
-add_subdirectory(./src/NBWindow ./NBWindows)
-add_subdirectory(./tests ./tests)
+if (BUILD_TESTS)
+    include(FetchContent)
+    FetchContent_Declare(
+        gtest
+        URL https://github.com/google/googletest/archive/refs/tags/release-1.12.1.zip
+    )
+    if (WIN32)
+        set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+        FetchContent_MakeAvailable(gtest)
+    endif()
+    include(GoogleTest)
+    set(GTEST_COLOR ON)
+endif()
+
+add_subdirectory(./engine)