Pass through for additional receiver channels

[Cyberslug]

I am interested in having additional channels not currently assigned available as additional servo outputs. I appreciate that the ledc library used for PWM output is limited to eight channels. I think that currently a maximum of six outputs are used in any model type leaving 2 spare which could be used. There is also the possibility of having more available using other libraries.

Have you looked at using ESP32Servo? I know that it uses ledc under the hood but it also uses mcpwm for a further 12 channels on the ESP32-S3.

What are your thoughts Paul? Would you welcome more than 8 channels being available or would you prefer to keep with ledc and just offer a further two channels?

[plainFlight]

As mentioned in the other pull request I like the idea. It would need thought on how to make it easy to configure for users... maybe a pass through class whos constructor would take channels and io's structure where the structure is defined in Config.hpp??

I would like to stick with my led servo class and 8 outputs max.
Also as mentioned I have tried to steer clear of 3rd party libraries unless they offer significant advantage like SoftWire.

Just another thought... a new fixed wing plane model type could be added that does not use flaps and only has 1 motor output. This would obviously allow 4 pass through channels.

[Cyberslug]

The idea of creating another fixed wing model with different channel usage occurred to me as well after submitting this issue. Eight channels is plenty for most models and I could certainly meet my needs this way. I think that fits better with the philosophy of the project as well.