Update GET responses to return book resource types' dates [YYYY]

As a librarian that uses the Agreements app
I want any title-package book resource type to display coverage data as [YYYY]
Because the current display of mm-dd-yyyy or yyyy-mm-dd does not make sense for books

Requirement

• Apply this to GET /eholdings/resources/ {resourceId}

  OR the API that Agreements calls to display a resource attached to an Agreement line

• If the resource type is a audiobook, book, or book series then coverage date should display [YYYY] and follow the following rules
  • If only start date is entered then return [YYYY] and null value should be returned for end date
  • If only end date is entered then return [YYYY] and null value should be returned for start date (if applicable)
  • If both start and end dates are entered then return [YYYY] for both start and end dates
• For eholdings app, no change to current coverage dates UI display requirements