#514 Add a component for participants to view or take an assessment

Proposed changes

Close #514, which is frontend for taking the assessment, whose component also functions as user view the previous submissions.

It should work for assessments of type assignment, quiz, and test.
- It also works displaying a previous submission, with different states: submitted, opened, expired and graded.
It should display a timer, if applicable, and hide this timer upon user request.
It should display questions of type single-choice as well as free response. If the list of single-choice options is greater than 5, let's display a dropdown instead.
Submitting should request user confirmation. User confirmation should also warn if any of the questions were not answered.
- There is a progress bar and a number indicating which question has been answered.
There should be a submission confirmation page after submitting that confirms the submission was received and displays the list of questions and answers again with the user's submitted answers, but with all form elements disabled.

This PR does not include:

[x] Related issue appears at beginning of pull request title with pound sign, and title describes the changes being proposed.
[x] Related issue is linked in pull request description using closing keywords.
[x] The appropriate label has been chosen for this pull request.
[x] The correct project has been selected for this pull request.
[x] All commits in this branch, including merge commits, begin with the issue number and a pound sign.
[x] Tests have been added, where appropriate; or, no tests are relevant for this pull request.
[x] This pull request contains UI changes, and screenshots of those UI images appear below; or, this pull request contains no UI changes.