Vim mecha changes (#66153)

This PR changes the following:

    fixes a bug with Vim overlays, making it always appear as if there was a pilot inside, even after leaving it
    adds a balloon alert when a mob fails to enter the mech due to its size
    adds a crafting recipe for Vim in the "robots" category
    allows using Vim as a circuit shell
    allows small mobs to use the mech as well

My reasoning behind the changes:

    fixing the overlay bug - bugfixes good, bugs bad
    balloon alert - it should help reduce confusion among players who can't figure why on earth they cannot enter the mech
    crafting recipe - I think a crafting recipe will make it a lot more accessible to players, especially because there is no way to learn about its existence in-game
    circuit shell - non-standard circuit shells can be pretty fun and people seemed to enjoy the ability to use circuits inside their piano synths or cameras, so I figured we could expand on this, while giving players more ways to interact with sentient pets
    maximum mob size increase - Vim has never really been built too often, most likely because even if people got their hands on a sentient pet, it wouldn't probably fit in the tiny mecha anyway. Currently pretty much only butterflies, rats and cockroaches can use Vim and they pretty much never become sentient.

code/datums/components/crafting/recipes.dm

@@ -444,6 +444,18 @@
 	time = 40
 	category = CAT_ROBOT
 
+/datum/crafting_recipe/vim
+	name = "Vim"
+	result = /obj/vehicle/sealed/car/vim
+	reqs = list(/obj/item/clothing/head/helmet/space/eva = 1,
+				/obj/item/bodypart/l_leg/robot = 1,
+				/obj/item/bodypart/r_leg/robot = 1,
+				/obj/item/flashlight = 1,
+				/obj/item/assembly/voice = 1)
+	tool_behaviors = list(TOOL_SCREWDRIVER)
+	time = 6 SECONDS //Has a four second do_after when building manually
+	category = CAT_ROBOT
+
 /datum/crafting_recipe/improvised_pneumatic_cannon //Pretty easy to obtain but
 	name = "Pneumatic Cannon"
 	result = /obj/item/pneumatic_cannon/ghetto