jax

47f1b3de - [export] Add documentation for debugging and for ensuring compatibility.

[export] Add documentation for debugging and for ensuring compatibility. The rendered documentation is at https://jax--21976.org.readthedocs.build/en/21976/export/export.html#developer-documentation (for the export developer documentation, including compatibility) and https://jax--21976.org.readthedocs.build/en/21976/export/shape_poly.html#debugging (for the shape polymorphism debugging documentation) While testing the compatibility mechanism I discovered that it can be circumvented by caches. To fix this, I added export_ignore_forward_compatibility to mlir.LoweringParameters.