Add FAQ to readme

[eonist]

• Q: Is my OpenKey safe?
  A: Your key is stored securely on GitHub. As long as you use two-factor authentication (2FA), it remains safe. Your key is only sent to OpenAI, and all the code it interacts with is open-source and easily inspectable. Your key is not sent to any other endpoints.

• Q: Is it legal to use my OpenAI API key in other people's apps?
  A: Yes, according to OpenAI's policy, you should not use your OpenAI key in other people's apps. However, when using Babel, it's considered your fork, meaning you own it. Thus, you're compliant with the policy.

• Q: Can I add my own features? Can I build my own infrastructure using Babel's code?
  A: Absolutely! Babel is designed to be modular and is licensed under the MIT License, allowing you to add features and build your own infrastructure as you see fit.