Implement toString on proxy classes.

src/main/java/me/melontini/commander/impl/expression/extensions/convert/LazyArrayWrapper.java

@@ -37,6 +37,15 @@ protected EvaluationValue get(int index) {
         };
     }
 
+    @Override
+    public String toString() {
+        StringJoiner joiner = new StringJoiner(", ", "[", "]");
+        for (int i = 0; i < size; i++) {
+            joiner.add(String.valueOf(function.apply(i)));
+        }
+        return joiner.toString();
+    }
+
     @Override
     public EvaluationValue get(int index) {
         return ProxyMap.convert(this.function.apply(index));

src/main/java/me/melontini/commander/impl/expression/extensions/convert/nbt/NbtCompoundStruct.java

@@ -23,4 +23,9 @@ public EvaluationValue get(Object key) {
         if (!(key instanceof String s)) return EvaluationValue.nullValue();
         return convert(compound.get(s));
     }
+
+    @Override
+    public String toString() {
+        return String.valueOf(compound);
+    }
 }

src/main/java/me/melontini/commander/impl/expression/extensions/convert/states/StateStruct.java

@@ -28,4 +28,9 @@ public EvaluationValue get(Object key) {
         }
         return EvaluationValue.nullValue();
     }
+
+    @Override
+    public String toString() {
+        return String.valueOf(state.getEntries());
+    }
 }