Numeric arrays
Add support for arrays of numbers, with a similar interface as arrays of structs/unions. Generated procedures should be able to handle record types, bare pointers, locatives, blobs, and maybe also SRFI-4 numeric vectors.
Rationale: SRFI-4 numeric vectors can be used as arguments to a C function, but they cannot be used as return values, or when the array address must be static, etc.
I'm not sure whether Jiffi should only provide macros to define numeric arrays, or if it should also provide several common numeric array types (u8, s32, f32) out of the box.