chore(task): deprecate after party tasks

lib/generators/after_party/task/task_generator.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require 'rails/generators'
+
+Rails.application.config.after_initialize do
+  module AfterParty
+    module Generators
+      class TaskGenerator
+        prepend Module.new {
+          def invoke_all
+            warn "[DEPRECATION] 'after_party:task' is deprecated. Use 'rails generate maintenance_tasks:task #{name}' instead."
+          end
+        }
+      end
+    end
+  end
+end