SwSh Egg program refactor (PokemonAutomation#1336)

* turn  run_batch() into state machine

* add NUM_EGGS_IN_PARTY, which affects number of eggs fetched on the first batch

* add SwSh::save_game()

* add watchers to confirm starting conditions for routines

* refactor talk_to_lady_to_fetch_egg

* refactor run_bike_loop

* fix bike loop routine

* add EmptySlotDetector. add check_box()

* run check_box() at the start of the program, and after every process_hatched_pokemon()

* fix initialization of num_eggs_retrieved and total_eggs_to_fetch

* add recovery routine if never spoke to lady. reset position.

* update logging

* check eggs in box, before process_hatched_pokemon()

* Change box view to judge or stats

* add parameter for number of expected eggs/empty slots

* update logging

* update comments

* change view to judge at beginning of program

* counting eggs and empty slots are split into separate functions

* update error message

Author: jw098