Add error handling to answerController

[tsimian]

The getAnswer, updateAnswer, and deleteAnswer functions in answerController.js are missing error handlers. This could cause unexpected behaviors. Please implement this error handling by wrapping the code in each function in a try/catch block.

You can use habitController.js as an example.

[codepley]

Hey, I would like to work on this issue.

[tsimian]

Assigned, thank you @codepley