Add react-native-earl-thermal-printer library entry

[Swif7ify]

📝 Why & how

A modern, high-performance thermal printer library for React Native. Built with the New Architecture (TurboModules) for synchronous communication, zero legacy bridge overhead, and Android 12+ Bluetooth compliance.

✅ Checklist

• Added library to react-native-libraries.json
• Updated library in react-native-libraries.json

• Documented how you found or replicated the issue.
• Explained how you fixed the issue or built the feature.
• Described how to use or verify the change.

[Simek]

Hey @Swif7ify, thanks for adding new entry! 👍

I'm not really sure what's happening with npm API, and why there is still no data available few days after the publish (it's the first time I see case like this). Hope this will get fixed soon, next publish also might help.