Added catch2 and cmakelists to test project, also translated math/mod tests to catch2

Test/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.16)
+project(Tests)
+
+set(CMAKE_CXX_STANDARD 17)
+
+include_directories(..)
+link_directories(../Eule/cmake-build-debug)
+
+add_executable(Tests
+        Catch2.h
+        main.cpp
+        Math__Mod.cpp
+)
+
+target_link_libraries(Tests Eule)