Add functionality to the test case component

[viralrathod10]

Given a block of code and a set of correct answers, make the test case components test the code and return whether the code passed or failed.

The things we have on the client include the user's code and a question (which has a question ID that we can use to look up the test case answers for that question).

[viralrathod10]

• Will be moved to Milestone 2
• Makes more sense to provide test case functionality when code can execute on the back-end and client can receive the result to test. Because a back-end is not allowed in this milestone, will be moved to next one.