Metrics screen

### Checks

- [x] I have read the Wiki, searched the open issues, and still think this is a new feature.

### Explain the problem clearly and succinctly:

There is currently no screen that displays statistics from the database, such as the number of Passkeys used, the number of weak passwords, etc.

### Describe the solution you'd like:

Create a statistics screen that displays:
- Weak passwords
- Reused passwords
- Passkeys
- OTP

### Describe alternatives you've considered:

_No response_

### Additional context:

Linked to https://github.com/Kunzisoft/KeePassDX/issues/1356

No files, tests, or entry points are identified in the issue, so first trace how the Android app reads vault data and where its screens are registered. Done means a statistics screen presents counts for weak passwords, reused passwords, passkeys, and OTP entries.

Written by the indexing model from the issue text.