Make it clearer how to enable sensorless homing

[Adrian-at-CrimsonAzure]

I spent an afternoon trying to get sensorless homing to work because I missed the fine print in the corner of the wiring diagram that says to "while ensuring that the jumper corresponding to the limit is in a closed state" and another reference that has an unlabeled section showing the diag and limit pins side by site. Can the documentation be updated to explicitly call out these jumpers for sensorless homing?

[luisfosoares]

@Adrian-at-CrimsonAzure As it was not added yet can you describe the correct way to make sensorless homing?

Thanks

[Adrian-at-CrimsonAzure]

It's been a while since I set this up, but I believe I bridged the two right most jumper pairs on the "diag" header to enable sensorless endstops for the A and B motors.

Then I used this config and tuned the stall guard threshold to work with my printer. This configuration repo is a very good starting point for setting up your Voron in general.