Epinephrine + epipen (#5444)

* add sprite and basic entity, no reagent or testing

* actually implement epinephrine and add it to the box

* allow creating it

* add it to nanomed

* fig

Resources/Textures/Objects/Specific/Medical/medipen.rsi/meta.json

@@ -0,0 +1,77 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "tgstation at 986af32e22a88dae14fd147d812a5a4d27c1bc30",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "medipen"
+    },
+    {
+      "name": "firstaid"
+    },
+    {
+      "name": "firstaid_empty"
+    },
+    {
+      "name": "hypovolemic"
+    },
+    {
+      "name": "hypovolemic_empty"
+    },
+    {
+      "name": "medipen_empty"
+    },
+    {
+      "name": "stimpen"
+    },
+    {
+      "name": "stimpen_empty"
+    },
+    {
+      "name": "morphen"
+    },
+    {
+      "name": "morphen_empty"
+    },
+    {
+      "name": "oxapen"
+    },
+    {
+      "name": "oxapen_empty"
+    },
+    {
+      "name": "penacid"
+    },
+    {
+      "name": "penacid_empty"
+    },
+    {
+      "name": "salacid"
+    },
+    {
+      "name": "salacid_empty"
+    },
+    {
+      "name": "salpen"
+    },
+    {
+      "name": "salpen_empty"
+    },
+    {
+      "name": "atropen"
+    },
+    {
+      "name": "atropen_empty"
+    },
+	{
+      "name": "medipen-inhand-left"
+    },
+    {
+      "name": "medipen-inhand-right"
+    }
+  ]
+}