Adds a minimal but viable implementation of string arrays (with numpy.dtypes.StringDType) in JAX. Currently this only supports making of a string array by means of either jax.numpy.asarray or jax.device_put and reading it back with jax.device_get.

Adds a minimal but viable implementation of string arrays (with numpy.dtypes.StringDType) in JAX. Currently this only supports making of a string array by means of either jax.numpy.asarray or jax.device_put and reading it back with jax.device_get. #123