Adds The Hand of Midas, an ancient Egyptian gun. (#78699)

## About The Pull Request
Adds the Hand of Midas (HoM), a weapon for pirate captains.

This matchlock pistol is powered by gold rather than gunpowder.
If you hit someone with it, they will be afflicted with Midas Blight for
a duration of time that scales with how much gold is in your gun.
Midas Blight will slowly turn their blood into gold, and slow them down
depending on how much blood is in their system.
If you right-click on someone with the HoM, it will siphon all gold from
their bloodstream and recharge the gun, curing them of Midas Blight in
the process if they still have it.
The amount of gold you can get from people is meant to be ~1.5x as much
as you fired into them in the first place, if you get your timing right.
This way you can exponentially scale the power of your weapon if you can
hit your shots, with a limit of 30 Seconds on the Blight timer.
The siphon has a range of 2 meters, and if you miss a shot you can input
a gold coin into the gun to refill it with the same weak shot you
started with.

It's a little hard to explain in text so here's some video examples:


https://github.com/tgstation/tgstation/assets/66052067/d49238fc-beb2-4ba9-be0c-83e8a701c995


https://github.com/tgstation/tgstation/assets/66052067/34dc23e7-2b88-4ee9-bb1e-c8067a491975


https://github.com/tgstation/tgstation/assets/66052067/68a07426-ba6c-43a7-8228-132fc4b02b83

## Why It's Good For The Game
Honestly I just had the idea for the gun and thought it would be really
cool lmao.
Also because Barrel Behind the Door is one of the funniest YuGiOh cards,
the censored design is TOO GOOD.


![image](https://github.com/tgstation/tgstation/assets/66052067/7c930287-410d-43bd-8731-0f7224b9f049)
## Changelog
🆑 Wallem
add: Adds The Hand of Midas, an ancient Egyptian matchlock pistol.
/🆑

code/modules/movespeed/modifiers/status_effects.dm

@@ -37,3 +37,19 @@
 
 /datum/movespeed_modifier/status_effect/tired_post_charge
 	multiplicative_slowdown = 3
+
+/// Get slower the more gold is in your system.
+/datum/movespeed_modifier/status_effect/midas_blight
+	id = MOVESPEED_ID_MIDAS_BLIGHT
+
+/datum/movespeed_modifier/status_effect/midas_blight/soft
+	multiplicative_slowdown = 0.25
+
+/datum/movespeed_modifier/status_effect/midas_blight/medium
+	multiplicative_slowdown = 0.75
+
+/datum/movespeed_modifier/status_effect/midas_blight/hard
+	multiplicative_slowdown = 1.5
+
+/datum/movespeed_modifier/status_effect/midas_blight/gold
+	multiplicative_slowdown = 2