add CLion build folders and folder attributes file from macOS finder to .gitignore
This is just to clean up the git diffs on macOS/CLion.
Clion creates these folders for builds in every platform:
and macOS uses these hidden .DS_Store
files to store folder attributes (like view as a list, as icons, icons size, etc), it's common to ignore them:
https://github.com/madler/zlib/blob/51b7f2abdade71cd9bb0e7a373ef2610ec6f9daf/.gitignore#L26
https://github.com/qt/qtbase/blob/a5ddcbb76b674470f0c3d1d5e0bb7697a2828d25/.gitignore#L223
Thanks!