App CLI commands should accept `--env`/`-e` option to set the HANAMI_ENV

[timriley]

This:

hanami blah -e test

Feels a lot nicer than this:

HANAMI_ENV=test hanami blah

Let's make it so.

[solnic]

I actually thought we already had that 😅

[timriley]

@solnic so did I! I tried it and was surprised to discover it wasn't there. Maybe back in snowpack?

[solnic]

@timriley yeah most likely :)