actually add vendor folder

vendor/raylib-cpp/tests/CMakeLists.txt

@@ -0,0 +1,20 @@
+# Test Options
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CTEST_CUSTOM_TESTS_IGNORE pkg-config--static)
+
+# Executable
+add_executable(raylib_cpp_test raylib_cpp_test.cpp)
+if (MSVC)
+    target_compile_options(raylib_cpp_test PRIVATE /Wall /W4)
+else()
+    target_compile_options(raylib_cpp_test PRIVATE -Wall -Wextra -Wconversion -Wsign-conversion)
+endif()
+target_link_libraries(raylib_cpp_test raylib_cpp raylib)
+
+# Test
+list(APPEND CMAKE_CTEST_ARGUMENTS "--output-on-failure")
+add_test(NAME raylib_cpp_test COMMAND raylib_cpp_test)
+
+# Copy all the resources
+file(COPY resources/ DESTINATION "resources/")