refactor(MatchChoiceItem): Convert to standalone

[Aaron-Detre]

Changes

• Converted MatchChoiceItem to standalone.

Test

• Items appear with the correct text.
• When answers are submitted, items are marked with the appropriate feedback text.
• When answers are submitted, correct answers are marked with a checkmark and a green background, and incorrect answers are marked with an X and a red background.

Closes #2051

[hirokiterashima]

The delete button doesn't show up for choices that were created by the student. You'll need to convert DeleteChoiceButton into a standalone component first, then import it in this component.

[hirokiterashima]

There are some conflicts to resolve.

Make sure that your develop is up-to-date and merge the latest from develop to this branch

git checkout develop
git pull
git checkout issue-2051-MatchChoiceItem-Standalone
git merge develop

Resolve conflicts, make sure that everything works.
Push your changes and re-request review.