fix building issue

[Odyflame]

Hi,David.

thanks for really interesting using tuist needle repo.

there's tiny issue when i execute your README guide.

when i just install needle and run make all, there's issue for tests location. maybe it needs files but there's no files in that path.

i think there are more way to fix it, but i suggest just simple solution.

just add Tests folder and some test codes, where emits error paths.

i added these files for DodiList and DodiRepository, and it makes me generate Dodi very well.