Add config file to printers.test. Fix errors in config and unify
settings with the mini-e3-v1.2 config.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This is a basic config example for a SKR Mini E3 v2.0, the pinouts are different than the 1.2 and requires different compile options, so worth having an example.
Signed-off-by: Paul Greidanus <paul@majestik.org>