Most things we need, we can instantiate directly.
This means we have to do less tweaking in service providers that
are meant to provide services to a complete Flarum application
(that has already been installed properly), to make them work with
the uninstalled app.
The uninstalled app (the "installer") can now do only the
bootstrapping it needs to build a light-weight web and console
application, respectively.
0222692c53