[FEAT] Update CMake project.

CMakeLists.txt

@@ -1,19 +1,10 @@
 cmake_minimum_required(VERSION 3.14)
-project(raytracing_challenge)
 
-set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-enable_testing()
-
-include_directories("${CMAKE_SOURCE_DIR}/tests")
-include_directories("${CMAKE_SOURCE_DIR}/src")
-
-add_executable(
-  raytracing_tests
-
-  src/tuple.cpp
-
-  tests/main.cpp
-  tests/chapitre01_tuples.cpp
+project(raytracing_challenge
+        VERSION 0.1
+        DESCRIPTION "Raytracing Challenge in c++"
 )
+
+add_subdirectory(raytracing)
+add_subdirectory(apps)
+add_subdirectory(tests)