Adjusts all get_temperature() accesses to compare it to a value (#95236)

## About The Pull Request

``get_temperature()`` returns a value in kelvins, not a boolean. Trying
to treat it as such will result in ***any*** item with a thermal value,
like condensers, being treated as a lighter.

## Why It's Good For The Game

Consistency, allows us to have actually functioning cooling items that
don't act like lighters all the time.

## Changelog
🆑
fix: Condensers can no longer be used to ignite things
/🆑

code/datums/elements/easy_ignite.dm

@@ -65,7 +65,7 @@
 /datum/element/easy_ignite/proc/attackby_react(obj/item/source, mob/user, obj/item/tool, modifiers)
 	SIGNAL_HANDLER
 
-	if(!tool.get_temperature())
+	if(tool.get_temperature() < FIRE_MINIMUM_TEMPERATURE_TO_EXIST)
 		return NONE
 
 	if (!item_ignition(source, tool, user))
@@ -83,7 +83,7 @@
 /datum/element/easy_ignite/proc/welder_react(obj/item/source, mob/user, obj/item/tool)
 	SIGNAL_HANDLER
 
-	if(!tool.get_temperature())
+	if(tool.get_temperature() < FIRE_MINIMUM_TEMPERATURE_TO_EXIST)
 		return NONE
 
 	if (!item_ignition(source, tool, user))