Codec integration (#33565)

* clean mimi commit

* some nits suggestions from Arthur

* make fixup

* rename repo id + change readme

* Update docs/source/en/model_doc/mimi.md

Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* add flaky flag to batching equivalence due to audio_codes failing sometimes

---------

Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

docs/source/en/_toctree.yml

@@ -722,6 +722,8 @@
         title: Hubert
       - local: model_doc/mctct
         title: MCTCT
+      - local: model_doc/mimi
+        title: Mimi
       - local: model_doc/mms
         title: MMS
       - local: model_doc/musicgen