In the docs replace references to native_posix with native_sim
Switch the default test platform to native_sim from native_posix
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
Adding exemplary pytest shell test to show possibilities of new pytest
plugin. This test uses bidirectional communication between tester and
device under test.
Signed-off-by: Grzegorz Chwierut <grzegorz.chwierut@nordicsemi.no>
