Provides the builder syntax for components. The builder provides three methods `use`, `optional` and `wrapper` and they allow the following invocations:

    config.wrappers do |b|
      # Use a single component
      b.use :html5

      # Use the component, but do not automatically lookup. It will only be triggered when
      # :placeholder is explicitly set.
      b.optional :placeholder

      # Use a component with specific wrapper options
      b.use :error, wrap_with: { tag: "span", class: "error" }

      # Use a set of components by wrapping them in a tag+class.
      b.wrapper tag: "div", class: "another" do |ba|
        ba.use :label
        ba.use :input
      end

      # Use a set of components by wrapping them in a tag+class.
      # This wrapper is identified by :label_input, which means it can
      # be turned off on demand with `f.input :name, label_input: false`
      b.wrapper :label_input, tag: "div", class: "another" do |ba|
        ba.use :label
        ba.use :input
      end
    end

The builder also accepts default options at the root level. This is usually used if you want a component to be disabled by default:

    config.wrappers hint: false do |b|
      b.use :hint
      b.use :label_input
    end

In the example above, hint defaults to false, which means it won‘t automatically do the lookup anymore. It will only be triggered when :hint is explicitly set.