Add assets

Assets/Cainos/Third Party/Lucid Editor/Runtime/Attributes/ValidateInputAttribute.cs

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+using System;
+using UnityEngine;
+
+namespace Cainos.LucidEditor
+{
+    [AttributeUsage(AttributeTargets.Field)]
+    public class ValidateInputAttribute : Attribute
+    {
+        public readonly string condition;
+        public readonly string message;
+        public readonly HelpBoxMessageType type = HelpBoxMessageType.Error;
+
+        public ValidateInputAttribute(string condition)
+        {
+            this.condition = condition;
+        }
+
+        public ValidateInputAttribute(string condition, string message)
+        {
+            this.condition = condition;
+            this.message = message;
+        }
+
+        public ValidateInputAttribute(string condition, string message, HelpBoxMessageType type)
+        {
+            this.condition = condition;
+            this.message = message;
+            this.type = type;
+        }
+    }
+}