Add .DS_Store in .gitignore

[Bam92]

Bug report

Describe the bug

The .DS_Store need to be in .gitignore

Steps to reproduce the behavior

The file is currently located in examples directory

Expected behavior

.DS_Store removed from the examples directory

Screenshots

N/A

Code snippets

N/A

System

N/A

Additional context

N/A

[opeolluwa]

I would like to fix this, could you assign it to me?