Combined LED example and LED RGB enhanced example

Instead of having a bunch of nearly identical LED examples, each just calling a single function (like on/off, pulse, etc), I combined them into a single example that produces a demo sequence using temporal. This should make it easier to maintain and also easier for users to see a full example in one place.

It also enhances the led-rgb example by adding a simple prompt demonstrating how the led can change color based on user input.