[NEEDS REVIEW] adds chemical heating (#16116)

* adds heating as a way of making chemicals through recipe

* adds density and SHC of found base elements. Adds more true-to-life heating

* adds defines for source_temperatures on hot objects, remakes the heating proc so it works according to the laws of physics

* conflict fixes

* fleshes out the bunsen burner. Adds an alteration to the dump chemical reactions proc that dumps general chemical information

* adds a thermometer for measuring the temperature of reagent containers, tweaks the bunsen burner values a bit, adds some more densities and SHCs

* Adds being able to construct and deconstruct bunsen burners

* adds the thermometer to the medvend, advanced thermometer to research, resizes the thermometers to be pocketable, et cetera.

* requested changes

* removes the chemistry diagnostic verb entirely, rather than leaving it commented out

code/modules/reagents/reagent_containers.dm

@@ -364,3 +364,18 @@ var/list/LOGGED_SPLASH_REAGENTS = list(FUEL, THERMITE)
 
 
 	return 1
+
+/obj/item/weapon/reagent_containers/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume)
+	reagents.heating(1000, exposed_temperature)
+	..()
+
+/obj/item/weapon/reagent_containers/attackby(obj/item/I, mob/user, params)
+	..()
+	attempt_heating(I, user)
+
+/obj/item/weapon/reagent_containers/proc/attempt_heating(obj/item/I, mob/user)
+	var/temperature = I.is_hot()
+	var/thermal_energy = I.thermal_energy_transfer()
+	if(temperature && reagents)
+		reagents.heating(thermal_energy, temperature)
+		to_chat(user, "<span class='notice'>You heat [src] with [I].</span>")