Add HiDrive support

### Please agree to the following

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

### Summary

Add support for HiDrive without using WebDAV.

### Motivation

Currently, it's already possible to use HiDrive via WebDAV. However, is comes with two caveats:

1. You have to pay for the HiDrive protocol package.
2. You have to deactivate 2FA to use WebDAV comfortable.

(Source: https://community.cryptomator.org/t/feature-request-hidrive-api-integration/10589)

Using the [HiDrive API](https://developer.hidrive.com/) would be more convenient.

### Considered Alternatives

_No response_

### Anything else?

_No response_

Start by reading the linked HiDrive API documentation and reviewing how the existing WebDAV-based HiDrive support is exposed in the iOS app. Define the API integration and authentication requirements, including 2FA compatibility; done means HiDrive works without WebDAV and the protocol package or 2FA caveats are removed.

Written by the indexing model from the issue text.