adds upgraded fuel tanks to the research biomass machine (#6415)

# About the pull request
adds new upgraded smoke and normal fuel tanks printable by the biomass
machine
upgraded smoke tank has a 200 unit capacity instead of 100
upgraded custom tank has 60 max intensity and 50 duration, 7 tile range
and 200 unit capacity (you still have to make a flamer fuel that reaches
these caps)
i will be severely impressed if anyone manages to make a chem that even
goes above 50 intensity

# Explain why it's good for the game
lets research reach the full potential of custom flamer chems while
still putting it behind a reasonable paywall

# Testing Photographs and Procedure
it works

# Changelog
:cl:
add: Added new upgraded incinerator fuel tanks printable by the biomass
analyzer.
/:cl:

---------

Co-authored-by: Drathek <[email protected]>

code/__DEFINES/misc.dm

@@ -162,6 +162,7 @@
 #define MATRIX_NVG 1
 #define MATRIX_WIDE 2
 
+#define RESEARCH_UPGRADE_NULL null
 #define RESEARCH_UPGRADE_EXCLUDE_BUY -2
 #define RESEARCH_UPGRADE_CATEGORY -1 //lord forgive me
 #define RESEARCH_UPGRADE_TIER_1 1

code/datums/research_upgrade_datum.dm

@@ -100,6 +100,7 @@
 	behavior = RESEARCH_UPGRADE_TIER_1
 	upgrade_type = ITEM_ACCESSORY_UPGRADE
 	clearance_req = 4
+
 /datum/research_upgrades/item/nanosplints
 	name = "Reinforced Fiber Splints"
 	desc = "A set of splints made from durable carbon fiber sheets reinforced with flexible titanium lattice, comes in a stack of five."
@@ -111,6 +112,28 @@
 	behavior = RESEARCH_UPGRADE_TIER_5 //adjust this to change amount of nanosplints in a stack, cant be higher than five, go change max_amount in the nanosplint itself, then change it.
 	upgrade_type = ITEM_ACCESSORY_UPGRADE
 
+/datum/research_upgrades/item/flamer_tank
+	name = "Upgraded Incinerator Tank"
+	desc = "An upgraded incinerator tank, with larger capacity and able to handle stronger fuels."
+	value_upgrade = 300
+	clearance_req = 1
+	change_purchase = 100
+	minimum_price = 100
+	maximum_price = 1000
+	item_reference = /obj/item/ammo_magazine/flamer_tank/custom/upgraded
+	behavior = RESEARCH_UPGRADE_NULL
+	upgrade_type = ITEM_ACCESSORY_UPGRADE
+
+/datum/research_upgrades/item/flamer_tank/smoke
+	name = "Upgraded Incinerator Smoke Tank"
+	desc = "An upgraded incinerator smoke tank with a larger capacity."
+	value_upgrade = 100 //not useful enough to be expensive
+	clearance_req = 1
+	item_reference = /obj/item/ammo_magazine/flamer_tank/smoke/upgraded
+	change_purchase = 50
+	minimum_price = 100
+	maximum_price = 500
+
 /datum/research_upgrades/armor
 	name = "Armor"
 	behavior = RESEARCH_UPGRADE_CATEGORY

code/modules/projectiles/magazines/flamer.dm

@@ -249,3 +249,24 @@
 	matter = list("metal" = 3750)
 	flamer_chem = null
 	custom = TRUE
+
+//tanks printable by the research biomass machine
+/obj/item/ammo_magazine/flamer_tank/custom/upgraded
+	name = "Upgraded custom incinerator tank"
+	desc = "A fuel tank used to store fuel for use in the M240 incinerator unit. This one has been modified with a larger and more sophisticated internal propellant tank, allowing for bigger capacity and stronger fuels."
+	matter = list("metal" = 50) // no free metal
+	flamer_chem = null
+	max_rounds = 200
+	max_range = 7
+	fuel_pressure = 1
+	max_duration = 50
+	max_intensity = 60
+	custom = TRUE
+
+/obj/item/ammo_magazine/flamer_tank/smoke/upgraded
+	name = "Large custom incinerator smoke tank"
+	desc = "A tank holding powdered smoke that expands when exposed to an open flame and carries any chemicals along with it. This one has been outfitted with an upgraded internal compressor, allowing for bigger capacity."
+	matter = list("metal" = 50) //no free metal
+	flamer_chem = null
+	custom = TRUE
+	max_rounds = 150