Revolver Resprites: Imaginos Edition (#72008)

## About The Pull Request
Self Explanatory! This PR resprites every revolver in the game and adds
a new variety: The Syndicate Revolver!

![image](https://user-images.githubusercontent.com/77556824/207713437-c4908250-be0b-47bc-9991-20dd106ebdd3.png)

This also takes into account detective revolvers and their reskins!

![image](https://user-images.githubusercontent.com/77556824/207713493-bcc384c6-fc9a-4a98-9199-acfe937d6d9b.png)

The Syndicate Revolver itself is a cosmetic change of the regular .357
revolver, which can still be found via gatfruit, or Garbage Day. The
Syndicate Revolver can be obtained via the battlecruiser, or any uplink.

Special thanks to @axietheaxolotl for making the Syndicate Revolver
sprite.
## Why It's Good For The Game
The previous sprites were either too old, or looked like plastic toys,
and desperately needed a visual overhaul. This PR addresses that issue
in a very direct manner!
## Changelog
🆑 PositiveEntropy, AxieTheAxolotl
imageadd: Resprites every revolver!
imageadd: Adds the Syndicate Revolver, a visually new, but mechanically
identical .357 revolver to uplinks!
/🆑

Co-authored-by: Fikou <23585223+Fikou@users.noreply.github.com>

code/modules/uplink/uplink_items/dangerous.dm

@@ -95,8 +95,8 @@
 
 /datum/uplink_item/dangerous/revolver
 	name = "Syndicate Revolver"
-	desc = "A brutally simple Syndicate revolver that fires .357 Magnum rounds and has 7 chambers."
-	item = /obj/item/gun/ballistic/revolver
+	desc = "Waffle Co.'s modernized Syndicate revolver. Fires 7 brutal rounds of .357 Magnum."
+	item = /obj/item/gun/ballistic/revolver/syndicate
 	progression_minimum = 30 MINUTES
 	cost = 13
 	surplus = 50