Implement all required compat with Ascend

src/main/java/net/fretux/skillengine/skilltree/SkillNode.java

@@ -4,6 +4,7 @@ import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 
 import java.util.List;
+import java.util.Map;
 
 public class SkillNode {
 
@@ -15,6 +16,8 @@ public class SkillNode {
     private final float y;
     private final List<ResourceLocation> links;
     private final List<ResourceLocation> tags;
+    private final ResourceLocation icons;
+    private final Map<String, Integer> prereqAttributes;
 
     public SkillNode(ResourceLocation id,
                      Component title,
@@ -22,7 +25,9 @@ public class SkillNode {
                      int cost,
                      float x, float y,
                      List<ResourceLocation> links,
-                     List<ResourceLocation> tags) {
+                     List<ResourceLocation> tags,
+                     ResourceLocation icons,
+                     Map<String, Integer> prereqAttributes) {
 
         this.id = id;
         this.title = title;
@@ -32,18 +37,51 @@ public class SkillNode {
         this.y = y;
         this.links = List.copyOf(links);
         this.tags = List.copyOf(tags);
+        this.icons = icons;
+        this.prereqAttributes = Map.copyOf(prereqAttributes);
     }
 
-    public ResourceLocation getId() { return id; }
-    public Component getTitle() { return title; }
-    public Component getDescription() { return description; }
-    public int getCost() { return cost; }
-    public float getX() { return x; }
-    public float getY() { return y; }
-    public List<ResourceLocation> getLinks() { return links; }
-    public List<ResourceLocation> getTags() { return tags; }
+    public ResourceLocation getId() {
+        return id;
+    }
+
+    public Component getTitle() {
+        return title;
+    }
+
+    public Component getDescription() {
+        return description;
+    }
+
+    public int getCost() {
+        return cost;
+    }
+
+    public float getX() {
+        return x;
+    }
+
+    public float getY() {
+        return y;
+    }
+
+    public List<ResourceLocation> getLinks() {
+        return links;
+    }
+
+    public List<ResourceLocation> getTags() {
+        return tags;
+    }
+
+    public ResourceLocation getIcons() {
+        return icons;
+    }
+
+    public Map<String, Integer> getPrereqAttributes() {
+        return prereqAttributes;
+    }
 
     public boolean isRoot() {
-        return links.isEmpty(); // or a dedicated flag if you want later
+        return links.isEmpty();
     }
 }