Proposed change

Handles Declaration field output for CYA, emails and CSV

Shows 'I understand and agree' or 'Not provided' in Summary page (CYA)
Shows TRUE or FALSE in CSV

NOTE - Once this PR is merged, it will need a plugin version bump for forms-notify-listener to change the email content according to the changes in the plugin.

Jira ticket: DF-312

Type of change

• Bug fix
• New feature
• Breaking change
• Misc. (documentation, build updates, etc)

Checklist

• You have executed this code locally and it performs as expected.
• You have added tests to verify your code works.
• You have added code comments and JSDoc, where appropriate.
• There is no commented-out code.
• You have added developer docs in README.md and docs/* (where appropriate, e.g. new features).
• The tests are passing (npm run test).
• The linting checks are passing (npm run lint).
• The code has been formatted (npm run format).