Add frozen string literal comment into generated files in Rails 7

add_frozen_string_literal_comment.rb

# frozen_string_literal: true

# Via https://gist.github.com/ta1kt0me/6a7058d16621785d4f7038bde6cd3b98
module RailsGeneratorFrozenStringLiteralPrepend
  RUBY_EXTENSIONS = %w[.rb .rake].freeze

  def render
    return super unless RUBY_EXTENSIONS.include?(File.extname(destination))

    "# frozen_string_literal: true\n\n#{super}"
  end
end

Thor::Actions::CreateFile.prepend RailsGeneratorFrozenStringLiteralPrepend