Add weapon data

public/data/weapons/osahoko.json

@@ -0,0 +1,17 @@
+{
+  "id": "osahoko",
+  "name": "Osahoko",
+  "atk": 287,
+  "crt": 27,
+  "rarity": 5,
+  "skills": [
+    {
+      "name": "Turbulence",
+      "description": "Upon Ultimate Evasion, gain an EM Charge that lasts 5s. The first attack that hits within this period consumes the EM Charge and deals an additional 4,000 Lightning DMG and 4,000 Physical DMG. Only 1 EM Charge can be gained every 1.5s."
+    },
+    {
+      "name": "EM Radiation",
+      "description": "Attacks have a 8.0% chance of paralyzing target and surrounding enemies for 3s. CD: 6s."
+    }
+  ]
+}