[MIRROR] [IDB IGNORE] [MDB IGNORE] Makes the icons/mob folder sane [MDB IGNORE] (#16030)

* [IDB IGNORE] [MDB IGNORE] Makes the icons/mob folder sane

* fix map merges

* icon paths and merge conflicts

Co-authored-by: skylord-a52 <skylord-a52@users.noreply.github.com>
Co-authored-by: tastyfish <crazychris32@gmail.com>

code/modules/mob_spawn/corpses/nonhuman_corpses.dm

@@ -19,7 +19,7 @@
 ///dead slimes, with a var for whatever color you want.
 /obj/effect/mob_spawn/corpse/slime
 	mob_type = /mob/living/simple_animal/slime
-	icon = 'icons/mob/slimes.dmi'
+	icon = 'icons/mob/simple/slimes.dmi'
 	icon_state = "grey baby slime" //sets the icon in the map editor
 	///the color of the slime you're spawning.
 	var/slime_species = "grey"

code/modules/mob_spawn/ghost_roles/mining_roles.dm

@@ -175,7 +175,7 @@
 /obj/structure/ash_walker_eggshell
 	name = "ash walker egg"
 	desc = "A man-sized yellow egg, spawned from some unfathomable creature. A humanoid silhouette lurks within. The egg shell looks resistant to temperature but otherwise rather brittle."
-	icon = 'icons/mob/lavaland/lavaland_monsters.dmi'
+	icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
 	icon_state = "large_egg"
 	resistance_flags = LAVA_PROOF | FIRE_PROOF | FREEZE_PROOF
 	max_integrity = 80
@@ -214,7 +214,7 @@
 	name = "ash walker egg"
 	desc = "A man-sized yellow egg, spawned from some unfathomable creature. A humanoid silhouette lurks within."
 	prompt_name = "necropolis ash walker"
-	icon = 'icons/mob/lavaland/lavaland_monsters.dmi'
+	icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
 	icon_state = "large_egg"
 	mob_species = /datum/species/lizard/ashwalker
 	outfit = /datum/outfit/ashwalker