The QEMU-based VM registered with `limactl start-at-login` in `launchd` does not start.

### Description

`launchd` only sets the `PATH` environment variable to `/usr/bin:/bin:/usr/sbin:/sbin`, so `limactl` fails to start because it cannot find `qemu-system-`.

The VM can be started by adding the following configuration to `io.lima-vm.autostart..plist`:
```xml
EnvironmentVariables

PATH
/opt/homebrew/bin:/usr/bin:/bin:/usr/sbin:/sbin

```

It would be beneficial if one of the following were done:
- The above configuration is automatically added to `io.lima-vm.autostart..plist`.
- The path to the QEMU to be used can be set in `lima.yaml`, and `limactl` can utilize it.
- An equivalent to the `QEMU_SYSTEM_` environment variable can be set in `lima.yaml`, and `limactl` can utilize it.

Thanks,