Deferred interrupt handling for lock state

[stkdiretto]

Goal: Use FreeRTOS capabilities for handling PIN_LOCK_LATCH_SWITCH and PIN_LOCK_ROTATION_SWITCH state changes.

Both pins should be attached to an ISR, which in turn notifies a waiting/blocking handler and takes care of anything from there on

[stkdiretto]

Partly solved in 76f2806

Motor opening/parking should be put into another task