Allow Footer Disclaimer to be Customizable via ENV Variable

[tadejmagajna]

The disclaimer message in the message footer is currently hardcoded in the component, which makes sense from a compliance standpoint, especially considering the EU AI Act’s requirements for disclaimer messages.

sample-app-aoai-chatGPT/frontend/src/components/Answer/Answer.tsx

Line 327 in 6cdac4f

<span className={styles.answerDisclaimer}>AI-generated content may be incorrect</span>

However, it would be extremely beneficial to provide an option for customizing this message or, at the very least, appending additional text to it. For instance, this could allow us to include contextual information such as Data last updated: 1.1.2024 after the standard disclaimer message.

This can easily be implemented via an optional ENV variable. Happy to contribute with code changes if this proposal is considered reasonable.