Fixes the crusher, and future twohands required items, equipping to slots (#22712)

* If plants have slotflags they can now be equipped

* now you can have more than one slot_flag

code/game/objects/items/weapons/twohanded.dm

@@ -111,7 +111,7 @@
 
 /obj/item/weapon/twohanded/equipped(mob/user, slot)
 	..()
-	if(!user.is_holding(src) && wielded)
+	if(!user.is_holding(src) && wielded && !istype(src, /obj/item/weapon/twohanded/required))
 		unwield(user)
 
 ///////////OFFHAND///////////////
@@ -165,6 +165,9 @@
 
 /obj/item/weapon/twohanded/required/equipped(mob/user, slot)
 	..()
+	var/slotbit = slotdefine2slotbit(slot)
+	if(slot_flags & slotbit)
+		return
 	if(slot == slot_hands)
 		wield(user)
 	else