Refactor Builder using modules

[Spone]

Let's work on our ViewComponent::Form::Builder to split it in smaller modules.

This way you can either inherit from it or include the modules you want.

We could have:

• ViewComponent::Form::Helpers::Rails for the standard Rails field helpers
• ViewComponent::Form::Helpers::RailsBackports for the backported Rails helpers
• ViewComponent::Form::Helpers::Custom for our own VC::Form helpers (error_message, hint)
• ViewComponent::Form::ValidationContext for our own validation context feature
• ViewComponent::Form::Lookup/ViewComponent::Form::Renderer for namespaces, render_component & component_klass