Add user/device information when granting permission

### Please agree to the following

- [X] I have searched [existing issues](https://github.com/cryptomator/hub/issues?q=) for duplicates
- [X] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/hub/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

I'd like to know exactly who or which devices I'm granting permission to.

### Motivation

When granting permission to new devices, I can only see the number of devices that haven't been permitted yet. I don't know exactly which users or which devices require permission.

### Considered Alternatives

_No response_

### Anything else?

_No response_