docs: add OTP examples to React Aria TextField docs

[reidbarber]

Adds Vanilla and Tailwind OTP (one-time-password) examples to the React Aria TextField docs.

Inspired by @snowystinger's example found here: #7374

Note: this currently hides the caret. We could probably try to show it and have it positioned in the correct spot over each box.

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

Test new OTP docs examples (vanilla and tailwind) on desktop and mobile.

🧢 Your Project:

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs

[reteps]

With this example, shouldn't you be able to backspace into previous inputs, and use arrow keys to navigate between inputs?