Add questionnaire pages for each life event and breadcrumb nav

[sknep]

Satisfies https://trello.com/c/daJ4CMWb/59-va-medallion-benefit-questions

WIP but welcome feedback.

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User story:

As a spouse of a deceased veteran, in order to determine my eligibility for VA Medallion benefit, I want to provide information about my family.

Pre-conditions:

• Bereavement life event navigation is available on BEARS site
• VA Medallion benefit eligibility requirements are available as rules (
• Questions covering eligibility requirements are designed

Acceptance Criteria:

• The user is displayed VA Medallion questions after choosing the bereavement life event
• The user can observe how each answer they provide affects the benefits results in real time
• The questions that do not affect the results are not displayed

Definition of Done:

• 90% or better test coverage
• Accessibility check (include screenreader)
• Linted
• No unexpected console errors
• Browser & device tested