Add weapon data

public/data/weapons/mig-13.json

@@ -0,0 +1,13 @@
+{
+  "id": "mig-13",
+  "name": "MiG-13",
+  "atk": 128,
+  "crt": 2,
+  "rarity": 3,
+  "skills": [
+    {
+      "name": "Multiple Cluster Missiles",
+      "description": "Launches homing missiles at multiple targets. Longer charge time. Slightly decreased DMG when hitting the same target multiple times.1st Sequence: 3 missiles.2nd Sequence: 7 missiles.3rd Sequence: 15 missiles."
+    }
+  ]
+}