Migrate the docs components to app/components to align with Phlex conversions

[karinevieira]

Phlex 2.0 follows a specific folder structure and naming convention for views and components.

For views, they should be placed in the app/views directory under the Views namespace, and must inherit from Views::Base.

# frozen_string_literal: true

class Views::Articles::Index < Views::Base
  def view_template
    h1 { "Articles" }
  end
end

For components, they should be placed in the app/components directory under the Components namespace, and must inherit from Components::Base.

class Components::Button < Components::Base
  def view_template
    button { "Click me" }
  end
end

This pull request begins migrating the components that are currently in the app/views/components folder to app/components, in accordance with the Phlex conventions.