Change status to maintenance mode

**Is your feature request related to a problem? Please describe.**
There is no way to see that maintenance mode is starting.
It does not show on the status page nor in the uptime monitor itself.
only on the Maintenance page status

**Describe the solution you'd like**
I come from uptime kuma
And where maintenance mode starts, all monitors that are set to maintenance mode change state to "maintenance mode"
And also on the status page, you can see this very clearly. And the admin can also add a message
like ETA of return to service, etc.
I would be happy if there was a possibility, for example, that maintenance mode starts, the monitor will change to "maintenance mode - up" so that it will still check but will not send notifications

Thanks!!