[i18n-fr] Translate installation to French (#27657)

* partial traduction of installation

* Finish translation of installation

* Update installation.mdx

* Rename installation.mdx to installation.md

* Typos

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update docs/source/fr/installation.md

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Address review comments

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Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

docs/source/fr/_toctree.yml

@@ -3,7 +3,7 @@
     title: 🤗 Transformers
   - local: quicktour
     title: Visite rapide
-  - local: in_translation
+  - local: installation
     title: Installation
   title: Démarrer
 - sections: