Electric Eels Prefer Used Car Batteries (#84221)

## About The Pull Request

Makes the preferred bait type of both types of eel the lead-acid
battery. Throw used car batteries into the ocean, how else will the eels
charge?


![image](https://github.com/tgstation/tgstation/assets/82386923/11388ca6-b21f-4a56-a075-c84b8ddefdf2)

![image](https://github.com/tgstation/tgstation/assets/82386923/360244c5-02d7-497b-ba3e-d1a78fb08ec0)

![image](https://github.com/tgstation/tgstation/assets/82386923/39edecb3-93e0-47a4-8484-08e7320314ef)
## Why It's Good For The Game

Makes the electric eels prefer a simply more realistic bait type, how
are they supposed to charge themselves using dough balls after all?
## Changelog
🆑
add: Electric eels now prefer used car batteries for bait.
/🆑

code/game/objects/items/maintenance_loot.dm

@@ -43,3 +43,4 @@
 	. = ..()
 	var/initial_percent = rand(20, 80) / 100
 	charge = initial_percent * maxcharge
+	ADD_TRAIT(src, TRAIT_FISHING_BAIT, INNATE_TRAIT)

code/modules/fishing/fish/fish_types.dm

@@ -316,6 +316,7 @@
 	random_case_rarity = FISH_RARITY_GOOD_LUCK_FINDING_THIS
 	required_temperature_min = MIN_AQUARIUM_TEMP+10
 	required_temperature_max = MIN_AQUARIUM_TEMP+30
+	favorite_bait = list(/obj/item/stock_parts/cell/lead)
 	fish_traits = list(
 		/datum/fish_trait/parthenogenesis,
 		/datum/fish_trait/mixotroph,
@@ -333,7 +334,6 @@
 	fish_traits = list(/datum/fish_trait/necrophage)
 	required_temperature_min = MIN_AQUARIUM_TEMP+15
 	required_temperature_max = MIN_AQUARIUM_TEMP+35
-
 	fish_ai_type = FISH_AI_ZIPPY
 	favorite_bait = list(
 		list(
@@ -651,7 +651,7 @@
 	average_size = 30
 	average_weight = 500
 	random_case_rarity = FISH_RARITY_VERY_RARE
-	favorite_bait = list(/obj/item/food/bait/doughball)
+	favorite_bait = list(/obj/item/stock_parts/cell/lead)
 	required_temperature_min = MIN_AQUARIUM_TEMP+18
 	required_temperature_max = MIN_AQUARIUM_TEMP+26
 	fish_traits = list(

code/modules/fishing/fishing_rod.dm

@@ -277,6 +277,8 @@
 		if(istype(bait, /obj/item/food/bait))
 			var/obj/item/food/bait/real_bait = bait
 			bait_state = real_bait.rod_overlay_icon_state
+		if(istype(bait, /obj/item/stock_parts/cell/lead))
+			bait_state = "battery_overlay"
 		. += bait_state
 
 /obj/item/fishing_rod/worn_overlays(mutable_appearance/standing, isinhands, icon_file)