Support for encrypting numbers

Hey folks,

I recently started using this for a hobby project and noticed that it is possible to encrypt Strings only.

```
Error: encryption enabled for field amount of unsupported type Float: only String fields can be encrypted.
```

Is there some inherent plugin/cryptography limitation to encrypting numbers, or was this just never a priority to implement?

If someone could give me a couple of hints around this I'd love to take a stab at implementing support for it.

The error message indicates the limitation is in the plugin's field type handling. Start by examining the source code for encryption logic, likely in a middleware or transformer file, to see how String fields are currently encrypted. Look for type checks and encryption/decryption functions. The goal is to extend support to numeric types like Float, ensuring serialization to/from encrypted strings works correctly. Testing will involve creating a Prisma schema with an encrypted Float field and verifying encryption/decryption cycles.

Scritto dal modello di indicizzazione a partire dal testo della issue.