* Added MeanAbsoluteError and started testing for losses.
Added testing for MeanSquaredError and MeanAbsoluteError as well as testing utils.
* Formatting fix for docstrings
* Switch docstrings to keras_core
* Add numpy ops (initial batch) and some config
* Add unit test
* fix call
* Revert "fix call"
This reverts commit 6748ad183029ff4b97317b77ceed8661916bb9a0.
* full unit test coverage
* fix setup.py