Add weapon data

public/data/weapons/brimstone.json

@@ -0,0 +1,13 @@
+{
+  "id": "brimstone",
+  "name": "Brimstone",
+  "atk": 102,
+  "crt": 55,
+  "rarity": 3,
+  "skills": [
+    {
+      "name": "Flame Bullets",
+      "description": "[SP: 15][CD: 13s] Deploys the weapon, firing a flaming projectile at a random enemy within range every 0.6s for the next 8s. The projectiles explode, dealing 482 Fire DMG to enemies in a small AOE."
+    }
+  ]
+}