[DNM][DNM][WIP] Projectile backend code port and update

Ports#54924,  #65061, #59804 from /tg.
adds auxiliary code from /tg to make code work.

code/modules/projectiles/projectile/beams.dm

@@ -166,7 +166,7 @@
 /obj/item/projectile/beam/lasertag/mag		//the projectile, compatible with regular laser tag armor
 	icon_state = "magjectile-toy"
 	name = "lasertag magbolt"
-	movement_type = FLYING | UNSTOPPABLE		//for penetration memes
+	movement_type = FLYING | PHASING		//for penetration memes
 	range = 5		//so it isn't super annoying
 	light_range = 2
 	light_color = LIGHT_COLOR_YELLOW

code/modules/projectiles/projectile/bullets/ferromagnetic.dm

@@ -28,7 +28,7 @@
 	damage = 10
 	armour_penetration = 20
 	stamina = 10
-	movement_type = FLYING | UNSTOPPABLE
+	movement_type = FLYING | PHASING
 	range = 6
 	fired_light_range = 1
 	fired_light_color = LIGHT_COLOR_RED
@@ -37,7 +37,7 @@
 	icon_state = "magjectile-large"
 	damage = 10
 	armour_penetration = 20
-	movement_type = FLYING | UNSTOPPABLE
+	movement_type = FLYING | PHASING
 	range = 20
 	pixels_per_second = TILES_TO_PIXELS(12.5)
 	fired_light_range = 4

code/modules/projectiles/projectile/bullets/sniper.dm

@@ -35,7 +35,8 @@
 	icon_state = "gauss"
 	name = "penetrator round"
 	damage = 60
-	movement_type = FLYING | UNSTOPPABLE
+	projectile_piercing = PASSMOB
+	projectile_phasing = (ALL & (~PASSMOB))
 	dismemberment = 0 //It goes through you cleanly.
 	knockdown = 0
 	breakthings = FALSE

code/modules/projectiles/projectile/bullets/special.dm

@@ -3,7 +3,8 @@
 /obj/item/projectile/bullet/honker
 	damage = 0
 	knockdown = 60
-	movement_type = FLYING | UNSTOPPABLE
+	movement_type = FLYING
+	projectile_piercing = ALL
 	nodamage = TRUE
 	candink = FALSE
 	hitsound = 'sound/items/bikehorn.ogg'

code/modules/projectiles/projectile/magic.dm

@@ -344,18 +344,17 @@
 	var/created = FALSE //prevents creation of more then one locker if it has multiple hits
 	var/locker_suck = TRUE
 
-/obj/item/projectile/magic/locker/prehit(atom/A)
+/obj/item/projectile/magic/locker/prehit_pierce(atom/A)
+	. = ..()
 	if(ismob(A) && locker_suck)
 		var/mob/M = A
-		if(M.anti_magic_check())
+		if(M.anti_magic_check()) // no this doesn't check if ..() returned to phase through do I care no it's magic ain't gotta explain shit - Silly-Cons
 			M.visible_message("<span class='warning'>[src] vanishes on contact with [A]!</span>")
-			qdel(src)
-			return
+			return PROJECTILE_DELETE_WITHOUT_HITTING
 		if(M.anchored)
-			return ..()
+			return
 		M.forceMove(src)
-		return FALSE
-	return ..()
+		return PROJECTILE_PIERCE_PHASE
 
 /obj/item/projectile/magic/locker/on_hit(target)
 	if(created)

code/modules/projectiles/projectile/special/curse.dm

@@ -12,7 +12,6 @@
 	knockdown = 20
 	pixels_per_second = TILES_TO_PIXELS(5)
 	range = 16
-	movement_type = FLYING | UNSTOPPABLE
 	var/datum/beam/arm
 	var/handedness = 0
 
@@ -29,18 +28,14 @@
 		arm = starting.Beam(src, icon_state = "curse[handedness]", time = INFINITY, maxdistance = INFINITY, beam_type=/obj/effect/ebeam/curse_arm)
 	..()
 
-/obj/item/projectile/curse_hand/prehit(atom/target)
-	if(target == original)
-		movement_type &= ~(UNSTOPPABLE)
-	else if(!isturf(target))
-		return FALSE
-	return ..()
+/obj/projectile/curse_hand/prehit_pierce(atom/target)
+	return (target == original)? PROJECTILE_PIERCE_NONE : PROJECTILE_PIERCE_PHASE
 
 /obj/item/projectile/curse_hand/Destroy()
 	if(arm)
 		arm.End()
 		arm = null
-	if((movement_type & UNSTOPPABLE))
+	if((movement_type & PHASING))
 		playsound(src, 'sound/effects/curse3.ogg', 25, 1, -1)
 	var/turf/T = get_step(src, dir)
 	var/obj/effect/temp_visual/dir_setting/curse/hand/leftover = new(T, dir)