The arm64 macbook pros are heavy and I usually care my intel one for
mobile, it would be nice if I can play with MLX on it.
To build with x64, user must pass `MLX_ENABLE_X64_MAC` to cmake:
CMAKE_ARGS='-DMLX_ENABLE_X64_MAC=ON' python setup.py
* buffer donation
* fix to move shared pointer
* format
* gpu in place for copy and binary
* revert ops test
* cpu in place
* a little cleanup
* remove useless bench
* added tri / tril / triu
* fixed tests
* ctest tests
* tri overload and simplified tests
* changes from comment
* more tests for m
* ensure assert if not 2-D
* remove broadcast_to
* minor tweaks
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Co-authored-by: Awni Hannun <awni@apple.com>