Cannot add package type files

### 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

Error “The file doesn’t exist.” when adding package type files

### System Setup

- iOS: 15.2
- Cryptomator: 2.0.4

### Cloud Type

Other File Provider

### Steps to Reproduce

1. Get a package file say test.swiftpm (or test.ooutline as package)
2. Drag & drop (copy & paste) the file into Cryptomator in Files.app
3. Error “The file doesn’t exist”.

### Expected Behavior

Expect them to be copied into the vault correctly.

### Actual Behavior

No files are copied with an error.

### Reproducibility

Always

### Relevant Log Output

_No response_

### Anything else?

_No response_

Start by reproducing the issue in Files.app with a test.swiftpm or test.ooutline package on iOS 15.2 and trace the file-copy handling in the iOS app. Done means package-type files are copied into the vault without the “The file doesn’t exist” error.

Written by the indexing model from the issue text.