Randomizer for name and birthdate

**Is your feature request related to a problem? Please describe.**

Data leaks and neglectful companies, public offices where the sole access control is semi-public data like birthdate or SSN in Merighetto. But where the correctness of that datum isn't actually required.

**Describe the solution you'd like**

Making the randomizer available for other fields than password. Templates for birthdate, name, SSN.
Sliders for various plausibility scales. Like is the date less than 100yo or inside the Unix epoch. Actual random characters in name or names from a list that "sound matching to a place". Can I have emoji in the name?

**Describe alternatives you've considered**
Doing it manually and then forgetting it.

**Additional context**

German Fedi Thread
https://chaos.social/@isotopp/111894724652060162

Start by locating the existing password randomizer entry point, since the issue does not name files or tests. Define the scope for additional templates, plausibility sliders, and name-generation options before implementation; done should include the agreed randomizer fields and their behavior.

Written by the indexing model from the issue text.