A configurable file upload middleware like the Express Multer usable alone or globally via barf.Augment

[opensaucerer]

Express has a third-party library called multer that provides a middleware-like interface with an abstraction done around busboy for intercepting multipart/form-data and processing it ahead of any further call in the route.

We can implement such for Barf with support for including it as a configuration to barf.Augment for using it as a standalone middleware in any route of choice.