Fix kernel commit and repo paths for ESMFold2 (#48186)

* Add AutoModelForProteinFolding, register ESMFold2 in AutoModel

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Pin ESMFold2 kernel revision just in case

* Flip ESMC repos to the right paths

* Update docs with the autoclass

* Fix a few more doc refs

* Lots more doc refs

* Revert AutoModelForProteinFolding, moving it to a separate PR

Keeps the -hf checkpoint paths in the docs but goes back to EsmFold2Model
in the usage examples.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* make fix-repo

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>