Initial modification to Tradheli guide

[bnsgeyer]

Here is the start of modification to the Tradheli guide. This is draft and still needs a lot of work.

[amilcarlucas]

https://github.com/ArduPilot/MethodicConfigurator/releases/tag/latest contains a Heli OMP_M4 template that @allister is working on. Should we use that instead of the Trex500 ?

[Allister779]

Let me know if you want any changes to the OMP_M4 files.

[amilcarlucas]

I did the changes locally (I could not push to your repo) and merged this one. Please create a new one to continue to work on this