Add question duplication feature

[Balastrong]

Related to #5

Adds duplication functionality to both text and choice question types in the survey generator, allowing users to duplicate questions directly from the UI.

• Implements a new duplication button in the QuestionCardButtonsBar for both TextFormField and ChoiceFormField components. This button uses the Copy icon from lucide-react.
• Adds duplication logic in the onClick handler of the new button, which duplicates the question using the form.insertFieldValue method from TanStack Form API. The duplicated question is inserted right below the original question, with a new unique ID generated for it using the generateId function.
• Maintains the existing functionality and structure of the question cards, ensuring that the addition of the duplication feature integrates seamlessly with the current design and operations.

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