Fixing /enhancing webCoRE is not a trivial task. There is a ton of code there...
My advice would be for you to look at @stephack’s Advanced Button Controller application which he updated yesterday to support the new Pico remote’s released events. It works amazingly well with directly connected bulbs.
So, I would think you could start with it and hack it to attempt to implement some sort of stair-step dimming for your Hue connected bulbs. I doubt it will work well, as sending repeated commands in rapid succession is likely to cause isssues.
