Adds "Proto-Kinetic Crusher", a melee mining weapon (#19891)

* Mining Hammer

* Adds the mining hammer "Proto-Kinetic Crusher" item
Makes megafauna a little easier to hit in melee
Makes jaunters and Hivelord cores fit in the mining belt

* Fixing a file that should have been untouched
Other miner (geddit) fixes for the mining hammer

code/modules/mob/living/simple_animal/hostile/megafauna/legion.dm

@@ -51,6 +51,7 @@ Difficulty: Medium
 	aggro_vision_range = 18
 	idle_vision_range = 13
 	appearance_flags = 0
+	mouse_opacity = 1
 
 /mob/living/simple_animal/hostile/megafauna/legion/New()
 	..()

code/modules/mob/living/simple_animal/hostile/megafauna/megafauna.dm

@@ -22,6 +22,7 @@
 	var/elimination = 0
 	anchored = TRUE
 	layer = LARGE_MOB_LAYER //Looks weird with them slipping under mineral walls and cameras and shit otherwise
+	mouse_opacity = 2 // Easier to click on in melee, they're giant targets anyway
 
 /mob/living/simple_animal/hostile/megafauna/death(gibbed)
 	if(health > 0)

code/modules/mob/living/simple_animal/hostile/mining_mobs.dm

@@ -15,6 +15,7 @@
 	var/icon_aggro = null // for swapping to when we get aggressive
 	see_in_dark = 8
 	see_invisible = SEE_INVISIBLE_MINIMUM
+	mob_size = MOB_SIZE_LARGE
 
 /mob/living/simple_animal/hostile/asteroid/Aggro()
 	..()
@@ -452,7 +453,6 @@
 	aggro_vision_range = 9
 	idle_vision_range = 5
 	anchored = 1 //Stays anchored until death as to be unpullable
-	mob_size = MOB_SIZE_LARGE
 	var/pre_attack = 0
 	var/pre_attack_icon = "Goliath_preattack"
 	loot = list(/obj/item/stack/sheet/animalhide/goliath_hide)