Add a placeholder for the question input

daily-thought-frontend/src/components/questions/NewQuestionForm.tsx

@@ -43,6 +43,7 @@ const NewQuestionForm: FC<NewQuestionFormProps> = ({
           type="text"
           name="new-question"
           id="new-question"
+          placeholder="A new exciting question..."
           className="block w-1/2 rounded-md border-0 py-1.5 text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 placeholder:text-gray-400 focus:ring-2 focus:ring-inset focus:ring-indigo-600 sm:text-sm sm:leading-6"
           value={newQuestion}
           onChange={(e) => setNewQuestion(e.target.value)}