This change introduces a rich text object to make
it easier to confirm it context is existing or not.

If we have a class like below.

class Information < ApplicationRecord
  has_rich_text :notes
end

Before:
i = Information.new
i.notes? => NoMethodError
i.notes = "Some sample text"
i.notes.present? => true

After:
i = Information.new
i.notes? => false

i.notes = "Some sample text"
i.notes? => true