Password statistics (unique passwords, compromised passwords)

**Is your feature request related to a problem? Please describe.**
i heard KeePass XC has password statistics, and google chrome has these particular statistics. it would make sense to implement here.

**Describe the solution you'd like**
... > Analytics
ex.
`Accounts: %d`
`Unique passwords: %d`
`Accounts with the same password: %d [show accounts]`
`Compromised passwords: %d [show compromised accounts]`
... > Settings > ... > Link to haveibeenpwned or somethin

**Describe alternatives you've considered**
Using KeePass XC

Start by reviewing the Analytics area and the relevant Settings entry point described in the request. Define the scope for account counts, duplicate-password reporting, compromised-password reporting, and the Have I Been Pwned link; done should mean the agreed statistics and settings behavior are implemented and verifiable.

Written by the indexing model from the issue text.