Hospital curtains add (#9707)

* curtainss

* sound_mono

* hotfix_curtains

Resources/Textures/Structures/Decoration/curtains.rsi/meta.json

@@ -0,0 +1,19 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "Taken from tgstation at https://github.com/tgstation/tgstation/commit/951c7976bf6cda431aed8a1b22a8624ff7dfd8e2",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "open",
+      "directions": 1
+    },
+    {
+      "name": "closed",
+      "directions": 1
+    }
+  ]
+}