add .gitattributes file (line ending, ...)

Define the line ending behavior of the different file extensions

Documentation:

• https://git-scm.com/book/fr/v2/Personnalisation-de-Git-Attributs-Git

Examples:

• https://github.com/alexkaratarakis/gitattributes
• https://gist.github.com/Voonder/d5f638b60ca8456691dfa1c6412a264e

changed milestone to %v0.1.0

added To Do label

mentioned in commit ba8338ad

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changed the description

mentioned in merge request !1 (merged)

closed via merge request !1 (merged)

mentioned in commit bf578493

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mentioned in merge request !2 (merged)

closed via merge request !2 (merged)

removed To Do label