Add from_unary and from_binary kernels

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**

I frequently want to create an array by applying an operation to one or two other arrays. All the arrays involved might have different types.

**Describe the solution you'd like**

I would like each array to have

* from_unary
* from_binary
* try_from_unary
* try_from_binary

**Describe alternatives you've considered**

**Additional context**

The issue names no files, tests, or entry points. Start by locating the array APIs and determining how unary and binary operations should handle arrays with different types and fallible operations. Done means the relevant arrays provide from_unary, from_binary, try_from_unary, and try_from_binary with agreed semantics.

Written by the indexing model from the issue text.