Fix: Cult construct can attack while their spells are on cooldown (All spells no longer have a Melee CD by default) (#68806)

Fixes #68779

#68382 Added a "melee cooldown" to ALL cooldown actions by default, which is something I wasn't sure about in the PR, but Space suggested it wouldn't affect anything. Turns out did affect some things

I instead have overridden all the new cooldown actions (Alien, spells, and some misc ones) to have a 0 second melee cooldown, allowing constructs and similar to attack and use spells freely

code/modules/spells/spell.dm

@@ -47,6 +47,7 @@
 	button_icon_state = "spell_default"
 	check_flags = AB_CHECK_CONSCIOUS
 	panel = "Spells"
+	melee_cooldown_time = 0 SECONDS
 
 	/// The sound played on cast.
 	var/sound = null