Add `Result.either`.
Add `Result.either`.

Let’s not kid ourselves, this thing is `Either` in different guise.

0xced/Carthage,NachoSoto/Carthage,NachoSoto/Carthage,abbeycode/Carthage,0xced/Carthage,abbeycode/Carthage,flovilmart/Carthage,erichoracek/Carthage,flovilmart/Carthage,flovilmart/Carthage,abbeycode/Carthage,NachoSoto/Carthage,abbeycode/Carthage,erichoracek/Carthage,erichoracek/Carthage,0xced/Carthage,erichoracek/Carthage