Add separate Iron Coast mission, weapon and enemy mods with SD HD artwork and audio

examples/mods/seeker_swarm/content.json

@@ -0,0 +1,75 @@
+{
+  "weapons": [
+    {
+      "id": "seeker_swarm:projectile",
+      "name": "Seeker Swarm Projectile",
+      "damage": 6,
+      "speed": 6,
+      "cooldown": 18,
+      "behavior": "homing",
+      "target": "all",
+      "offsets": [
+        [
+          -7,
+          -2
+        ],
+        [
+          0,
+          -5
+        ],
+        [
+          7,
+          -2
+        ]
+      ],
+      "art": {
+        "png": "art/projectile-sd.png",
+        "hd_png": "art/projectile-hd.png",
+        "logical_width": 8,
+        "logical_height": 16,
+        "nearest": true
+      },
+      "script": "scripts/weapon.rhai"
+    }
+  ],
+  "items": [
+    {
+      "id": "seeker_swarm:equipment",
+      "name": "Seeker Swarm",
+      "price": 14000,
+      "max_count": 1,
+      "initial_count": 1,
+      "weapon": "seeker_swarm:projectile",
+      "special": true,
+      "consumable": false,
+      "art": {
+        "png": "art/equipment-sd.png",
+        "hd_png": "art/equipment-hd.png",
+        "logical_width": 16,
+        "logical_height": 16,
+        "nearest": true
+      },
+      "script": "scripts/equipment.rhai"
+    }
+  ],
+  "sounds": [
+    {
+      "id": "seeker_swarm:fire",
+      "name": "Seeker Swarm Fire",
+      "file": "audio/fire.wav",
+      "volume": 92,
+      "pan": 127,
+      "pitch": 128,
+      "priority": 1
+    },
+    {
+      "id": "seeker_swarm:impact",
+      "name": "Seeker Swarm Impact",
+      "file": "audio/impact.wav",
+      "volume": 78,
+      "pan": 127,
+      "pitch": 128,
+      "priority": 2
+    }
+  ]
+}