Description:
    Creates a new plugin with the given name in the specified directory

Usage:
    rails generate open_project:plugin NAME DIRECTORY

Example:
    rails generate open_project:plugin stuff ~/

    This will create:
        ~/openproject-stuff
        ~/openproject-stuff/CHANGELOG.md
        ~/openproject-stuff/openproject-stuff.gemspec
        ~/openproject-stuff/lib
        ~/openproject-stuff/lib/openproject-stuff.rb
        ~/openproject-stuff/lib/open_project
        ~/openproject-stuff/lib/open_project/stuff.rb
        ~/openproject-stuff/lib/open_project/stuff
        ~/openproject-stuff/lib/open_project/stuff/engine.rb