Add Modular grenades (chemnades). (#7138)

Resources/Textures/Objects/Weapons/Grenades/modular.rsi/meta.json

@@ -0,0 +1,34 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "Taken from tgstation at commit https://github.com/tgstation/tgstation/commit/29c0ed1b000619cb5398ef921000a8d4502ba0b6 and modified by Swept",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+        "name": "empty",
+        "directions": 1
+    },
+    {
+        "name": "wired",
+        "directions": 1
+    },
+    {
+        "name": "no-payload",
+        "directions": 1
+    },
+    {
+        "name": "complete",
+        "directions": 1
+    },
+    {
+        "name": "primed",
+        "directions": 1,
+        "delays": [
+            [ 0.2, 0.2 ]
+        ]
+    }
+  ]
+}