Documentation: describe our built-in lockout settings
Problem to solve
Our lockout settings rely on devise gem, and by default a user is locked out after 5 unsuccessful login attempts, see the issue https://gitlab.com/gitlab-org/gitlab/-/issues/27047. After 10 minutes, temporary locked in removed. Also, it is possible to unlock user manually via the Admin area > User > user name > Unlock user.
All these things are not described in the docs
Proposal
Let's add the above-mentioned information to the docs.
Other links/references
Related issues: