Adds Nutrition Percentage to belly options

Changelog:
Adds a Nutrition Percentage to belly options. It can range from 0.01 (mostly to avoid potental divide by zero issues) to 100, the default.

Affects both prey and all digestable items.

code/modules/vore/eating/belly_dat_vr.dm

@@ -14,6 +14,7 @@
 	var/human_prey_swallow_time = 100		// Time in deciseconds to swallow /mob/living/carbon/human
 	var/nonhuman_prey_swallow_time = 30		// Time in deciseconds to swallow anything else
 	var/emoteTime = 600						// How long between stomach emotes at prey
+	var/nutrition_percent = 100				// Nutritional percent per tick in digestion mode.
 	var/digest_brute = 2					// Brute damage per tick in digestion mode
 	var/digest_burn = 3						// Burn damage per tick in digestion mode
 	var/digest_tickrate = 3					// Modulus this of air controller tick number to iterate gurgles on
@@ -105,6 +106,7 @@
 	new_belly.human_prey_swallow_time = human_prey_swallow_time
 	new_belly.nonhuman_prey_swallow_time = nonhuman_prey_swallow_time
 	new_belly.emote_time = emoteTime
+	new_belly.nutrition_percent = nutrition_percent
 	new_belly.digest_brute = digest_brute
 	new_belly.digest_burn = digest_burn
 	new_belly.immutable = immutable

code/modules/vore/eating/belly_obj_vr.dm

@@ -19,6 +19,7 @@
 	var/human_prey_swallow_time = 100		// Time in deciseconds to swallow /mob/living/carbon/human
 	var/nonhuman_prey_swallow_time = 30		// Time in deciseconds to swallow anything else
 	var/emote_time = 60 SECONDS				// How long between stomach emotes at prey
+	var/nutrition_percent = 100				// Nutritional percentage per tick in digestion mode
 	var/digest_brute = 2					// Brute damage per tick in digestion mode
 	var/digest_burn = 2						// Burn damage per tick in digestion mode
 	var/immutable = FALSE					// Prevents this belly from being deleted
@@ -129,6 +130,7 @@
 		"human_prey_swallow_time",
 		"nonhuman_prey_swallow_time",
 		"emote_time",
+		"nutrition_percent",
 		"digest_brute",
 		"digest_burn",
 		"immutable",
@@ -478,7 +480,7 @@
 	if(!digested)
 		items_preserved |= item
 	else
-		owner.nutrition += (5 * digested)
+		owner.nutrition += ((nutrition_percent / 100) * 5 * digested)
 		if(isrobot(owner))
 			var/mob/living/silicon/robot/R = owner
 			R.cell.charge += (50 * digested)
@@ -661,6 +663,7 @@
 	dupe.human_prey_swallow_time = human_prey_swallow_time
 	dupe.nonhuman_prey_swallow_time = nonhuman_prey_swallow_time
 	dupe.emote_time = emote_time
+	dupe.nutrition_percent = nutrition_percent
 	dupe.digest_brute = digest_brute
 	dupe.digest_burn = digest_burn
 	dupe.immutable = immutable

code/modules/vore/eating/bellymodes_vr.dm

@@ -193,7 +193,7 @@
 						var/mob/living/silicon/robot/R = owner
 						R.cell.charge += 25*compensation
 					else
-						owner.nutrition += 4.5*compensation
+						owner.nutrition += (nutrition_percent / 100)*4.5*compensation
 				to_update = TRUE
 
 				continue
@@ -213,9 +213,9 @@
 				var/mob/living/silicon/robot/R = owner
 				R.cell.charge += 25*damage_gain
 			if(offset) // If any different than default weight, multiply the % of offset.
-				owner.nutrition += offset*(4.5*(damage_gain)/difference) //4.5 nutrition points per health point. Normal same size 100+100 health prey with average weight would give 900 points if the digestion was instant. With all the size/weight offset taxes plus over time oxyloss+hunger taxes deducted with non-instant digestion, this should be enough to not leave the pred starved.
+				owner.nutrition += offset*((nutrition_percent / 100)*4.5*(damage_gain)/difference) //4.5 nutrition points per health point. Normal same size 100+100 health prey with average weight would give 900 points if the digestion was instant. With all the size/weight offset taxes plus over time oxyloss+hunger taxes deducted with non-instant digestion, this should be enough to not leave the pred starved.
 			else
-				owner.nutrition += 4.5*(damage_gain)/difference
+				owner.nutrition += (nutrition_percent / 100)*4.5*(damage_gain)/difference
 
 
 //////////////////////////// DM_ABSORB ////////////////////////////

code/modules/vore/eating/vorepanel_vr.dm

@@ -255,6 +255,10 @@
 		dat += "<br><a href='?src=\ref[src];b_tastes=\ref[selected]'>Can Taste:</a>"
 		dat += " [selected.can_taste ? "Yes" : "No"]"
 
+		//Nutritional percentage
+		dat += "<br><a href='?src=\ref[src];b_nutritionpercent=\ref[selected]'>Nutritional Percentage:</a>"
+		dat += " [selected.nutrition_percent]%"
+
 		//How much brute damage
 		dat += "<br><a href='?src=\ref[src];b_brute_dmg=\ref[selected]'>Digest Brute Damage:</a>"
 		dat += " [selected.digest_brute]"
@@ -771,6 +775,13 @@
 		else if(new_grow)
 			selected.shrink_grow_size = (new_grow*0.01)
 
+	if(href_list["b_nutritionpercent"])
+		var/new_damage = input(user, "Choose the percentage of nutrition you will recieve per tick from prey. Ranges from 0.01 to 100.", "Set Belly Brute Damage.", selected.digest_brute) as num|null
+		if(new_damage == null)
+			return
+		var/new_new_damage = CLAMP(new_damage, 0.01, 100)
+		selected.nutrition_percent = new_new_damage
+
 	if(href_list["b_burn_dmg"])
 		var/new_damage = input(user, "Choose the amount of burn damage prey will take per tick. Ranges from 0 to 6.", "Set Belly Burn Damage.", selected.digest_burn) as num|null
 		if(new_damage == null)