Implement trial activities

src/main/java/emu/nebula/data/resources/ActivityDef.java

@@ -0,0 +1,25 @@
+package emu.nebula.data.resources;
+
+import emu.nebula.data.BaseDef;
+import emu.nebula.data.ResourceType;
+
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = "Activity.json")
+public class ActivityDef extends BaseDef {
+    private int Id;
+    private int ActivityType;
+    
+    private transient emu.nebula.game.activity.ActivityType type;
+    
+    @Override
+    public int getId() {
+        return Id;
+    }
+
+    @Override
+    public void onLoad() {
+        this.type = emu.nebula.game.activity.ActivityType.getByValue(this.ActivityType);
+    }
+}