Added .gitignore to omit .DS_Store files

[AminuIsrael]

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Add link to your design

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[perriefidelis]

Hi, @AminuIsrael thanks for sending in a PR, but can you properly describe what exactly you're trying to fix?

[AminuIsrael]

Hi. @perriefidelis, I noticed the repository had an unwanted file .DS_store I deleted them in each subdirectory and added a .gitignore which doesn't push them to the remote repository.