Convenient way of loading specific module in repl

[jforberg]

By default "cabal repl" loads only the public exports of a module. Often during development we need to access also the private definitions of a module.

This is possible to do in a cabal project too, but is inconvenient:

cabal repl --repl-no-load --repl-options=MyModule.hs

It also triggers a -Wmissing-home-modules warning.

It would be nice if there was an official syntax to perform this operation, supported by cabal repl out of the box.