Add generator for ApplicationService

[kimrgrey]

After installation of the gem into Rails project it should be possible to run bin/rake performify:install to generate ApplicationService.

[piton4eg]

@kimrgrey what do you want to place into generated filed?

[par0v0zik]

@kimrgrey What about a generator for typical create/update services?
To scaffold the service and corresponding spec.

[kimrgrey]

@piton4eg nothing, as ActiveRecord doesn't add anything to ApplicationRecord. Main point here is to leave the room for possible additions + prevent users from monkey patching Performify::Base if they need any common behaviour.

[kimrgrey]

@par0v0zik sounds great to me 👍