Match func_02038708 (ItemData::ApplyEffect) and document Item-related functions

[Eebit]

Closes #8 (hooray!).

[decomp-dev]

Report for YFEE01 (3450c6b - 88de8ee)

📈 Matched code: 7.32% (+0.03%, +524 bytes)

✅ 15 new matches

Unit	Item	Bytes	Before	After
src/item	ItemData::IsUsableOn(unsigned long, unsigned long)	+976	0.00%	100.00%
src/item	ItemData::IsUsableBy(Unit*)	+900	0.00%	100.00%
src/item	ItemData::ApplyEffect(Unit*)	+524	0.00%	100.00%
src/item	ItemData::ApplyEffect(Unit*, Unit*)	+296	0.00%	100.00%
src/item	ItemData::GetEffectiveJob(Unit*)	+164	0.00%	100.00%
src/item	ItemData::UnlocksDoor(Unit*)	+92	0.00%	100.00%
src/item	ItemData::UnlocksBridge(Unit*)	+92	0.00%	100.00%
src/item	ItemData::UnlocksChest(Unit*)	+92	0.00%	100.00%
src/unit_item	Item::CanReduceUses(Unit*)	+92	0.00%	100.00%
src/item	Item::IsRepairable()	+80	0.00%	100.00%
src/item	ItemData::GetStaffHealAmount(Unit*)	+68	0.00%	100.00%
src/item	ItemData::IsMagical()	+60	0.00%	100.00%
src/unit_item	Item::ReduceUses(Unit*)	+52	0.00%	100.00%
src/item	ItemData::GetMaxRange(Unit*)	+40	0.00%	100.00%
src/item	ItemData::GetHealAmount()	+8	0.00%	100.00%

🥀 14 broken matches

Unit	Item	Bytes	Before	After
src/item	func_02038914	-976	100.00%	0.00%
src/item	func_02038384	-900	100.00%	0.00%
src/item	func_02038ce4	-296	100.00%	0.00%
src/item	GetJInfoFromItem	-164	100.00%	0.00%
src/item	func_02038e80	-92	100.00%	0.00%
src/item	func_02038edc	-92	100.00%	0.00%
src/item	func_02038f38	-92	100.00%	0.00%
src/unit_item	Item::func_0203e09c(Unit*)	-92	100.00%	0.00%
src/item	func_02038f94	-80	100.00%	0.00%
src/item	func_02038e3c	-68	100.00%	0.00%
src/item	func_02038348	-60	100.00%	0.00%
src/unit_item	Item::func_0203e0f8(Unit*)	-52	100.00%	0.00%
src/item	GetItemMaxRange	-40	100.00%	0.00%
src/item	func_02038e34	-8	100.00%	0.00%

📉 1 regression in an unmatched item

Unit	Item	Bytes	Before	After
src/item	func_02038708	-509	97.21%	0.00%