Random Virus Event Overhaul (#5615)

This PR makes it so that random lethal viruses can only occur if there is a virologist to cure them. This PR also makes it so the viruses themselfs don't have completely random effects, but effects that make sense together by adding a new system.

code/modules/virus2/effect.dm

@@ -100,7 +100,7 @@
 	activate(var/mob/living/carbon/mob,var/multiplier)
 		mob.apply_effect(2*multiplier, IRRADIATE, blocked = 0)
 
-/datum/disease2/effect/deaf
+/datum/disease2/effect/deaf_major
 	name = "Deafness"
 	stage = 4
 	badness = 2
@@ -370,7 +370,6 @@
 			mob << "<span class='warning'>You feel like you are about to sneeze!</span>"
 		addtimer(CALLBACK(src, .proc/do_sneeze, mob, multiplier), 5)
 
-
 	proc/do_sneeze(mob/living/carbon/mob, multiplier)
 		if (QDELETED(mob))
 			return

code/modules/virus2/generated_diseases.dm

@@ -0,0 +1,150 @@
+/datum/disease2/disease/generated
+	var/generated_name = "Generated Disease"
+	var/dangerous = FALSE
+	uniqueID = 10000
+	var/list/effect_datums = list()
+
+/datum/disease2/disease/generated/New()
+
+	antigen = list(pick(ALL_ANTIGENS))
+	antigen |= pick(ALL_ANTIGENS)
+	affected_species = get_infectable_species()
+
+	for(var/i=1,i<effect_datums.len,i++)//It's a basic loop because I need the "i" for the stage number.
+		var/datum/disease2/effect/E = effect_datums[i]
+		var/datum/disease2/effectholder/H = new /datum/disease2/effectholder
+		H.stage = i
+		H.effect = new E
+		H.effect.generate()
+		H.chance = rand(0,H.effect.chance_maxm)
+		H.multiplier = rand(1,H.effect.maxm)
+		effects += H
+	..()
+
+/datum/disease2/disease/generated/cold
+	generated_name = "Spacecold"
+	spreadtype = "Airborne"
+	uniqueID = 10001
+	speed = 5
+	effect_datums = list(
+		/datum/disease2/effect/gunck,
+		/datum/disease2/effect/sneeze,
+		/datum/disease2/effect/fridge,
+		/datum/disease2/effect/drowsness
+	)
+
+/datum/disease2/disease/generated/cough
+	generated_name = "Moghes Cough"
+	spreadtype = "Airborne"
+	uniqueID = 10002
+	speed = 5
+	effect_datums = list(
+		/datum/disease2/effect/headache,
+		/datum/disease2/effect/cough,
+		/datum/disease2/effect/groan,
+		/datum/disease2/effect/drool
+	)
+
+/datum/disease2/disease/generated/zombie
+	generated_name = "Cannibal Fever"
+	dangerous = TRUE
+	uniqueID = 10003
+	effect_datums = list(
+		/datum/disease2/effect/drool,
+		/datum/disease2/effect/hungry,
+		/datum/disease2/effect/groan,
+		/datum/disease2/effect/mind
+	)
+
+/datum/disease2/disease/generated/madness
+	generated_name = "Sensory Madness Syndrome"
+	dangerous = TRUE
+	uniqueID = 10004
+	effect_datums = list(
+		/datum/disease2/effect/headache,
+		/datum/disease2/effect/blind,
+		/datum/disease2/effect/hallucinations,
+		/datum/disease2/effect/deaf_major
+	)
+
+/datum/disease2/disease/generated/clone
+	generated_name = "Cloning Tube Disorder"
+	dangerous = TRUE
+	uniqueID = 10005
+	effect_datums = list(
+		/datum/disease2/effect/twitch,
+		/datum/disease2/effect/hair,
+		/datum/disease2/effect/mutation,
+		/datum/disease2/effect/radian
+	)
+
+/datum/disease2/disease/generated/hyper
+	generated_name = "Hormonal Infectious Disease"
+	dangerous = TRUE
+	uniqueID = 10006
+	effect_datums = list(
+		/datum/disease2/effect/twitch,
+		/datum/disease2/effect/stimulant,
+		/datum/disease2/effect/chem_synthesis,
+		/datum/disease2/effect/killertoxins
+	)
+
+/datum/disease2/disease/generated/telepathy
+	generated_name = "Skrell Syndrome"
+	dangerous = TRUE
+	uniqueID = 10007
+	effect_datums = list(
+		/datum/disease2/effect/headache,
+		/datum/disease2/effect/hair,
+		/datum/disease2/effect/telepathic,
+		/datum/disease2/effect/bones
+	)
+
+/datum/disease2/disease/generated/laughter
+	generated_name = "Ligma"
+	spreadtype = "Airborne"
+	speed = 10
+	stageprob = 20
+	uniqueID = 10011
+	effect_datums = list(
+		/datum/disease2/effect/giggle,
+		/datum/disease2/effect/giggle,
+		/datum/disease2/effect/giggle,
+		/datum/disease2/effect/giggle
+	)
+
+/datum/disease2/disease/generated/dna
+	generated_name = "DNA Disease"
+	dangerous = TRUE
+	uniqueID = 10012
+	effect_datums = list(
+		/datum/disease2/effect/twitch,
+		/datum/disease2/effect/hair,
+		/datum/disease2/effect/mutation,
+		/datum/disease2/effect/dna
+	)
+
+/datum/disease2/disease/generated/fever
+	generated_name = "Worker's Fever"
+	uniqueID = 10013
+	speed = 5
+	stageprob = 15
+	effect_datums = list(
+		/datum/disease2/effect/headache,
+		/datum/disease2/effect/drowsness,
+		/datum/disease2/effect/confusion,
+		/datum/disease2/effect/shakey
+	)
+
+/datum/disease2/disease/generated/spaceflu
+	generated_name = "Space Flu"
+	spreadtype = "Airborne"
+	dangerous = TRUE
+	uniqueID = 10014
+	effect_datums = list(
+		/datum/disease2/effect/gunck,
+		/datum/disease2/effect/sneeze,
+		/datum/disease2/effect/fridge,
+		/datum/disease2/effect/toxins
+	)
+