feat: add TalltyImportExport::ExportableForm

lib/tallty_import_export.rb

@@ -12,6 +12,7 @@ module TalltyImportExport
 
   autoload :Common
   autoload :Exportable
+  autoload :ExportableForm
   autoload :Export
   autoload :Importable
   autoload :Import

lib/tallty_import_export/exportable_form.rb

+module TalltyImportExport
+  module ExportableForm
+    extend ActiveSupport::Concern
+    include Common
+
+    included do |base|
+      # base.include(Common)
+      base.const_set('Export', Class.new(TalltyImportExport::ExportForm))
+    end
+
+    module ClassMethods
+      def export_instance
+        const_get('Export').new(self)
+      end
+
+      def export_xlsx records, **options
+        export_instance.export_xlsx(records, **options)
+      end
+    end
+  end
+end