Support additional effect parameters in DMX effect channel mapping

[dschiefer84]

Currently, the DMX effect mode specification defines 15 channels, including effect selection, speed, and intensity. While this works for many effects, some effects in WLED have more than two adjustable parameters. At the moment, these extra parameters cannot be controlled via DMX, which limits creative flexibility and makes certain effects only partially usable in DMX-controlled setups.

Extend the DMX effect channel mapping to support all available effect parameters (up to 5 parameters per effect). This would allow:

Full DMX control of all effect parameters without being restricted to just speed and intensity.

More consistent behavior across effects that offer multiple adjustable values.

Greater creative flexibility for live shows and installations using WLED with DMX controllers.

This enhancement would ensure that DMX users can fully unlock the capabilities of WLED’s effect engine and integrate it more seamlessly into professional lighting workflows.

[netmindz]

Might be worth doing a wider review of all modes/personalities not just the Effect Mode

[mxklb]

Instead of 2 channels speed & intensity, always use 5 channels per default, nevertheless if needed? How many effects use these 5 paramters? So actually 15 DMX channels becomes 18? RGBW 21. Maybe a waste of DMX channels, for only handfull of effects using it? Or combine channels into macro channels? Is it worst the effort, having channels only being used by some effects? Same is true for 2nd 3rd color, etc ..

Would be easy to implement, but as @netmindz said, a more general concept is missing, tbd.