added platform admin as required extension

Signed-off-by: Ninjaparade <ninja@ninjaparade.ca>
added converter

Signed-off-by: Ninjaparade <ninja@ninjaparade.ca>
added cart controller

Signed-off-by: Ninjaparade <ninja@ninjaparade.ca>
register converter service provider and alias

Signed-off-by: Ninjaparade <ninja@ninjaparade.ca>