Delete old accounts automatically

[MrKrisKrisu]

Is your feature request related to a problem? Please describe.
Over time, many users become inactive or never really used the account and forgot about it after registration, so it exists unused.

Describe the solution you'd like
I want accounts that have not been logged in or checked in for 1 year to be automatically deleted.

The user should be informed before (1 month, 14 days, 7 days, 2 days, 1 day before) about the deletion by email.

Describe alternatives you've considered
A large database full of unnecessary data.

Additional context
None, but if you're reading this: Have a nice day.

Fun fact: The size of the Trwl database is currently 42G*.

*data + index

[MrKrisKrisu]

closed with #2207