Add Pork Elf toilet support to the diet

[eegeeZA]

Summary

The Pork Elf toilet reduces fullness by 1 on the first daily campground rest, provided at least 2 fullness is already used. CONSUME currently has no awareness of this — the free slot goes unused on days driven by CONSUME standalone.

This PR integrates the toilet into the diet plan:

• Plans one extra fullness slot when the toilet is available.
• Fills the stomach past the real cap (cap+1 total food).
• Injects a single rest 1 campground; just before the food action that would exceed the real cap, so the toilet flush makes room for that item.

Guard conditions (pork_elf_toilet_available())

• Pork Elf toilet is present in get_campground().
• _porkElfToiletUsed is false.
• A free rest is available (total_free_rests() > timesRested), so the rest never costs an adventure.

The extra slot is only reserved when the remaining fullness to fill is >= 2 (i.e. the toilet would actually proc). If food runs out before the extra slot is needed, no rest is injected and the diet is simply <= cap — no harm done.

Changes

• CONSUME/CONSTANTS.ash: add ORGAN_REST = 12.
• CONSUME.ash: add pork_elf_toilet_available() helper; reserve/inject logic in get_diet(); emit rest 1 campground; in append_diet_action().

Testing

CONSUME SIM with the toilet installed and _porkElfToiletUsed=false prints a diet planning fullness_limit()+1 fullness with exactly one rest 1 campground; positioned among the food items, before the cap-exceeding item.

With _porkElfToiletUsed=true (or toilet absent, or no free rests remaining), CONSUME SIM plans the normal fullness_limit() with no rest in the diet.