Add a (limited) way to add specific information to a ShapeErrorAdmittedly wonky, but space efficient.Result<(), ShapeError> used to be 1 byte, and with this change itexpands to 16 bytes (2 usize on 64-bit).The remaining 15 bytes are used for optimistically packing as much ofextra info into the error message as possible.For example we can store expected/actual index for errors (for exampleindex out of bounds or axis out of bounds, these are not so commonlyhandled with ShapeError).With this change it is supported:- Expected/actual index with 7 bytes per index- Expected/actual shape with 7 bytes per shape  supports storing shapes with one or two bytes (< 256²) per dimension,  with limited ndim.

Where possible, add expected/actual information to the ShapeError.In many places it is identified new places where more specificErrorKinds and error messages are needed. These are not updated here - acomment is inserted - this will be updated in a future version, when wecan accept breaking changes.