Monitoring of multiple events in one interface

### Is your feature request related to a problem?

_No response_

### Describe the solution you'd like

In my program, I use asyncio in multiprocessing. I don't want to create a separate interface for each process. Can I monitor them all in a single interface?

### Describe alternatives you've considered

Maybe the web server can be separate from the aiomonitor class, and the web server starts separately. The aiomonitor instance just sends messages to it.

### Additional context

_No response_

### Code of Conduct

- [X] I agree to follow the aio-libs Code of Conduct