Gun refactor (#8301)

Co-authored-by: Kara <lunarautomaton6@gmail.com>
Co-authored-by: T-Stalker <le0nel_1van@hotmail.com>
Co-authored-by: T-Stalker <43253663+DogZeroX@users.noreply.github.com>
Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>
Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Resources/Textures/Objects/Weapons/Guns/Ammunition/Casings/shotgun_shell.rsi/meta.json

@@ -11,7 +11,49 @@
             "name": "base"
         },
         {
-            "name": "spent"
+            "name": "base-spent"
+        },
+        {
+            "name": "beanbag"
+        },
+        {
+            "name": "beanbag-spent"
+        },
+        {
+            "name": "blank"
+        },
+        {
+            "name": "blank-spent"
+        },
+        {
+            "name": "flare"
+        },
+        {
+            "name": "flare-spent"
+        },
+        {
+            "name": "flash"
+        },
+        {
+            "name": "flash-spent"
+        },
+        {
+            "name": "incendiary"
+        },
+        {
+            "name": "incendiary-spent"
+        },
+        {
+            "name": "practice"
+        },
+        {
+            "name": "practice-spent"
+        },
+        {
+            "name": "slug"
+        },
+        {
+            "name": "slug-spent"
         }
     ]
 }