Adds Gene Targetting mode to Floral Somatoray

While I was rooting around in hydroponics code, I saw that a list was being regenerated with UI interaction, so I threw the list into the plant controller.

No proper sprites for the Floral Somatoray's new mode yet, but it uses the gun sprite from mutate mode, and the projectile sprite from yield mode.

code/modules/projectiles/guns/energy/special.dm

@@ -44,10 +44,12 @@
 	origin_tech = list(TECH_MATERIAL = 2, TECH_BIO = 3, TECH_POWER = 3)
 	modifystate = "floramut"
 	self_recharge = 1
+	var/decl/plantgene/gene = null
 
 	firemodes = list(
 		list(mode_name="induce mutations", projectile_type=/obj/item/projectile/energy/floramut, modifystate="floramut"),
 		list(mode_name="increase yield", projectile_type=/obj/item/projectile/energy/florayield, modifystate="florayield"),
+		list(mode_name="induce specific mutations", projectile_type=/obj/item/projectile/energy/floramut/gene, modifystate="floramut"),
 		)
 
 /obj/item/weapon/gun/energy/floragun/afterattack(obj/target, mob/user, adjacent_flag)
@@ -58,6 +60,28 @@
 		return
 	..()
 
+/obj/item/weapon/gun/energy/floragun/verb/select_gene()
+	set name = "Select Gene"
+	set category = "Object"
+	set src in view(1)
+
+	var/genemask = input("Choose a gene to modify.") as null|anything in plant_controller.plant_gene_datums
+
+	if(!genemask)
+		return
+
+	gene = plant_controller.plant_gene_datums[genemask]
+
+	to_chat(usr, "<span class='info'>You set the [src]'s targeted genetic area to [genemask].</span>")
+
+	return
+
+/obj/item/weapon/gun/energy/floragun/consume_next_projectile()
+	. = ..()
+	var/obj/item/projectile/energy/floramut/gene/G = .
+	if(istype(G))
+		G.gene = gene
+
 /obj/item/weapon/gun/energy/meteorgun
 	name = "meteor gun"
 	desc = "For the love of god, make sure you're aiming this the right way!"

code/modules/projectiles/projectile/special.dm

@@ -121,6 +121,15 @@
 		else
 			return 1
 
+/obj/item/projectile/energy/floramut/gene
+	name = "gamma somatoray"
+	icon_state = "energy2"
+	damage = 0
+	damage_type = TOX
+	nodamage = 1
+	check_armour = "energy"
+	var/decl/plantgene/gene = null
+
 /obj/item/projectile/energy/florayield
 	name = "beta somatoray"
 	icon_state = "energy2"