Add French translation: french README.md (#28696)

* doc: french README

Signed-off-by: ThibaultLengagne <thibaultl@padok.fr>

* doc: Add Depth Anything

Signed-off-by: ThibaultLengagne <thibaultl@padok.fr>

* doc: Add french link in other docs

Signed-off-by: ThibaultLengagne <thibaultl@padok.fr>

* doc: Add missing links in fr docs

* doc: fix several mistakes in translation

Signed-off-by: ThibaultLengagne <thibaultl@padok.fr>

---------

Signed-off-by: ThibaultLengagne <thibaultl@padok.fr>
Co-authored-by: Sarapuce <alexandreh@padok.fr>

README_ja.md

@@ -83,6 +83,7 @@ user: ユーザ
         <b>日本語</b> |
         <a href="https://github.com/huggingface/transformers/blob/main/README_hd.md">हिन्दी</a>
         <a href="https://github.com/huggingface/transformers//blob/main/README_te.md">తెలుగు</a> |
+        <a href="https://github.com/huggingface/transformers//blob/main/README_fr.md">Français</a> |
     </p>
 </h4>