Added Criterion unit test framework

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.12)
 project("RedScarfEngine"
     VERSION 0.0.1
     DESCRIPTION "Vulkan based 3D engine"
-    LANGUAGES CXX)
+    LANGUAGES C CXX)
 
 
 # make sure c++ 20 is set
@@ -32,4 +32,5 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror")
 
 add_subdirectory(red_scarf_engine)
 add_subdirectory(utilities)
-add_subdirectory(graphics)
+add_subdirectory(graphics)
+add_subdirectory(tests)