[Feature] expose switch as a lightbulb
### Problem description

Atm a switch can either be exposed as a switch or an outlet. It'd be great if it can also be published as a lightbulb. This is mainly to support all the zigbee switch modules out there that basically just control light, such as [zbminil2](https://sonoff.tech/product/diy-smart-switches/zbmini-l2/), while Siri light commands (e.g. "Siri, turn off the lights") only works on lightbulb services.

### Suggested solution

just as you enable exposing the switch as an outlet, enable setting the type to a "lightbulb":
```json
{
  "converters": {
    "switch": {
      "type": "lightbulb"
    }
  }
}
``` 

### Alternative solutions

well... to use an additional plugin (e.g. mqtthing) just to change the service type... but that's quite an overhead and complicates/duplicates configurations for such a small change. 

### Additional context / information

_No response_