Add Emergency Shotgun Cabinet (#21419) (#22327)

* add emergency shotgun

* yml parent cleanup

Resources/Textures/Structures/Wallmounts/shotgun_cabinet.rsi/meta.json

@@ -0,0 +1,50 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "Inspired by tg station\u0027s fireaxe cabinet https://github.com/tgstation/tgstation/commit/d0d81185f09ca30d3b0856d476544240dba0de53 Made by DISCORD@ps3moira#9488",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "glass"
+    },
+    {
+      "name": "glass-1"
+    },
+    {
+      "name": "glass-2"
+    },
+    {
+      "name": "glass-3"
+    },
+    {
+      "name": "glass-4"
+    },
+    {
+      "name": "glass-up"
+    },
+    {
+      "name": "locked"
+    },
+    {
+      "name": "shotgun"
+    },
+    {
+      "name": "unlocked"
+    },
+    {
+      "name": "cabinet"
+    },
+    {
+      "name": "cabinet-empty-open"
+    },
+    {
+      "name": "cabinet-filled-closed"
+    },
+    {
+      "name": "cabinet-filled-open"
+    }
+  ]
+}