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Remove the never_reset concept and replace it with Python finalizers to enable automatic hardware cleanup through garbage collection. Key changes: - Add finalizers to digitalio.DigitalInOut, keypad objects, and rp2pio.StateMachine - Restructure cleanup flow in main.c to run GC finalization - Remove all never_reset tracking (pin bitmasks, device flags, object flags) - Remove bulk reset functions (reset_uart, reset_rp2pio_statemachine) - Simplify reset_port() to only port-wide cleanup - Remove never_reset declarations from shared-bindings headers - Remove never_reset calls from shared-module display drivers Objects now use mp_obj_malloc_with_finaliser() and have __del__ methods that call deinit(). Hardware resources are automatically freed when objects are garbage collected or explicitly deinit only. Fixes micropython#8960
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Remove the never_reset concept and replace it with Python finalizers to enable automatic hardware cleanup through garbage collection.
Key changes:
Objects now use mp_obj_malloc_with_finaliser() and have del methods that call deinit(). Hardware resources are automatically freed when objects are garbage collected or explicitly deinit only.
Fixes #8960