replacement for asData() to handle strided backing. (#130)

* replacement for asData() to handle strided backing.

- fixes #117
- asData() now returns a struct with stride information
- takes a policy enum to indicate whether the consumer wants contiguous data

fix to_array behavior with bool -- was not promoting types correctly (#…

…127)

* fix to_array behavior with bool -- was not promoting types correctly
* treat Int as Int32 to match python
* add specialized handling for item() to avoid conversions

update to pick up mlx v0.16.0 (#115)

- ml-explore/mlx@v0.15.2...v0.16.0
- https://github.com/ml-explore/mlx-c/pull/31/files

V0.15.2 mlx/mlx-c update (#101)

v0.15.2 update

- this is mlx-c aligned with v0.14.0 and mlx v0.15.2

- fix x86 release builds -- conditional compile for neon code
- add bitwise ops from previous releases (now present in mlx-c)
- big change is JIT metal shaders -- the build should be faster and smaller

handle non-contiguous backing when reading out MLXArray (#96)

* handle non-contiguous backing when reading out MLXArray

- fixes #83
- mlx::core::array can have non-contiguous backing
- handle those cases and simplify the readout

adopt latest mlx-c and mlx v0.3.0 (#6)