[Design] Update UI for Freeform Answer components

[nichole-aquino]

Overview

Form builders can easily add/edit Freeform Answer components (short answer, long answer)

Context

Reference:

• Eng ticket: [Eng] Update UI for Freeform Answer components #455
• Figma mockups
• USWDS components: text input and text-area, unstyled button, delete icon

Rename components:

• Short answer: No change
• Long answer: No change

On the build screen:

• Relabel the question input field to ‘Question text’
• Widen the question input field
• Remove the configuration options for ‘default field value’ and ‘maximum length’
• Add optional help text component with grey text style; the field grows as needed (GH ticket #373)
• Add optional information box component 'Add supplementary information or instructions' (GH ticket #415)

Acceptance Criteria

The changes should be made to the following question types:

• Short answer
  
• Long answer
  
• Long answer with information box added