Add new slider switch type
This is a fantastic plugin.  Thanks for all your hard work.

I would like to request a new slider switch type.  This would be a combination of a toggle switch and a yet to be implemented slider/dimmer control.

Short presses would toggle the switch ON & OFF.  Long press would open up a slider control much like a dimmer switch.  The position of the dimmer would call a request object out of user specified list.  The list of request objects would have the same schemas that this plugin uses.  

Example uses include:
-Turning ON/OFF stereo with volume control
-Turning ON/OFF fan with speed control
-Light dimmer switch
-etc.


Another developer has already something similar but it's not 100%.  He has the slider part implemented but not the ON/OFF part. I have contacted him and it is not a high priority for him.  Also, this plugins request object schema is much more versatile.

https://github.com/datMaffin/homebridge-http-slider/blob/request_objects/README.md


Thank you.  Keep up the good work!



