Adds SLP-57 (#1792)

Adds the SLP-57, intended to eventually replace the Mk58.

Resources/Prototypes/DeltaV/Entities/Objects/Weapons/Guns/Pistols/pistols.yml

@@ -131,4 +131,25 @@
     graph: WeaponPistolFlintlockCraftedGraph
     node: flintlock
   - type: UseDelay
-    delay: 0 #Straight up doesn't work for guns
+    delay: 0 #Straight up doesn't work for guns
+
+- type: entity
+  name: SLP-57
+  parent: BaseWeaponPistol
+  id: WeaponPistolSLP57
+  description: The ubiquitous, compact, and reliable Self-Loading Pistol, Model 57. Uses .35 auto ammo.
+  components:
+  - type: Sprite
+    sprite: DeltaV/Objects/Weapons/Guns/Pistols/slp57.rsi
+  - type: Clothing
+    sprite: DeltaV/Objects/Weapons/Guns/Pistols/slp57.rsi
+  - type: Gun
+    minAngle: 0
+    maxAngle: 30
+    angleIncrease: 10
+    angleDecay: 100
+    fireRate: 6
+    availableModes:
+    - SemiAuto
+    soundGunshot:
+      path: /Audio/Weapons/Guns/Gunshots/mk58.ogg

Resources/Textures/DeltaV/Objects/Weapons/Guns/Pistols/slp57.rsi/meta.json

@@ -0,0 +1,39 @@
+{
+    "version": 1,
+    "license": "CC0-1.0",
+    "copyright": "Original work by TJohnson.",
+    "size": {
+        "x": 32,
+        "y": 32
+    },
+    "states": [
+        {
+            "name": "icon"
+        },
+        {
+            "name": "base"
+        },
+        {
+            "name": "bolt-open"
+        },
+        {
+            "name": "mag-0"
+        },
+        {
+            "name": "inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "equipped-BELT",
+            "directions": 4
+        },
+		{
+            "name": "equipped-SUITSTORAGE",
+            "directions": 4
+        }
+    ]
+}