Add Sidekiq support to Zeus. Allows to run Sidekiq with `zeus sidekiq`

custom_plan.rb

require 'zeus/rails'

class CustomPlan < Zeus::Rails
  def sidekiq
    # Based on bin/sidekiq
    require 'sidekiq/cli'

    begin
      cli = Sidekiq::CLI.instance
      cli.parse
      cli.run
    rescue => e
      raise e if $DEBUG
      STDERR.puts e.message
      STDERR.puts e.backtrace.join("\n")
      exit 1
    end
  end
end

Zeus.plan = CustomPlan.new

zeus.json

{
  "command": "ruby -rubygems -r./custom_plan -eZeus.go",

  "plan": {
    "boot": {
      "default_bundle": {
        "development_environment": {
          "prerake": {"rake": []},
          "runner": ["r"],
          "console": ["c"],
          "server": ["s"],
          "sidekiq": [],
          "generate": ["g"],
          "destroy": ["d"],
          "dbconsole": []
        },
        "test_environment": {
          "test_helper": {"test": ["rspec", "testrb"]}
        }
      }
    }
  }
}