Maint: Normalize line endings and add .gitattributes (#2805)

* Maint: Normalize line endings and add .gitattributes

* Update .gitattributes

Co-authored-by: Echedey Luis <80125792+echedey-ls@users.noreply.github.com>

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Co-authored-by: Echedey Luis <80125792+echedey-ls@users.noreply.github.com>

Author: Aditya-myst

.gitattributes

@@ -1,2 +1,4 @@
+# ensure right line ending normalization in all contributor setups
+* text=auto
 # reduce the number of merge conflicts
 docs/sphinx/source/whatsnew/* merge=union