Remove plugins.gradle and factor into common extension

game/plugin/entity/spawn/src/spawn.plugin.kts

@@ -0,0 +1,24 @@
+import org.apollo.cache.def.NpcDefinition
+import org.apollo.game.model.entity.Npc
+
+start { world ->
+    Spawns.list.forEach {
+        val definition = if (it.id != null) NpcDefinition.lookup(it.id!!) else lookup_npc(it.name)
+        if (definition == null) {
+            throw IllegalArgumentException("Invalid NPC name or ID ${it.name}, ${it.id}")
+        }
+
+        val npc = Npc(world, definition.id, it.position)
+        npc.turnTo(it.position.step(1, it.facing))
+
+        if (it.spawnAnimation != null) {
+            npc.playAnimation(it.spawnAnimation)
+        }
+
+        if (it.spawnGraphic != null) {
+            npc.playGraphic(it.spawnGraphic)
+        }
+
+        world.register(npc)
+    }
+}