WPZ-4: Ability to mark a book as finished

[ambrose40]

Estimated time: 2-4 hours

Requirements

As a user, I want to be able to mark a book as finished in my reading list.

• Starting from the chore/code-review branch from Task 1, create a new branch feat/mark-as-read.
• Update the api code to provide a new PUT /api/reading-list/:id/finished endpoint.
• This endpoint should update the finished flag to true.
• And set finishedDate as an ISO date string (e.g. 2020-01-01T00:00:00.000Z).
• Update the UI to allow user to mark a book as finished from the reading list sidenav.
• Bonus points for a thoughtful UI/UX design for this feature
• Indicate the book as finished in the sidenav, including the finished date.
• The user can still remove the book from their reading list.
• Removing a book will reset the finished status (i.e. if they add the book back it will not be finished).
• The Want to Read button should change to Finished.
• Write new unit tests to test new mark as finished feature.
• Write a new e2e test in apps/okreads-e2e/src/specs/reading-list.spec.ts to test the new mark as finished feature.
• Commit your changes on the feature branch.
• Open a pull-request with chore/code-review as the target.