Migrating into main package / uploading to hackage

As far as I'm aware this package is more or less the go-to way to do type-safe http api calls when using the js backend, so it'd be good to have it more officially supported and be able to get it without pulling it directly from github.

No files, tests, or entry points are identified in the issue. Start by reviewing the repository package layout and how it could move into the main package, then check the requirements for publishing on Hackage. Done means the package is officially supported through the main package and available from Hackage.

Written by the indexing model from the issue text.