add units support in float, double and Float3 input

Source/Engine/Scripting/Attributes/Editor/ValueCategoryAttribute.cs

@@ -0,0 +1,35 @@
+// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
+
+using System;
+
+namespace FlaxEngine
+{
+    /// <summary>
+    /// Used to specify the value category of a numeric value as either as-is (a scalar), a distance (formatted as cm/m/km)
+    /// or an angle (formatted with a degree sign).
+    /// </summary>
+    /// <seealso cref="System.Attribute" />
+    [Serializable]
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
+    public sealed class ValueCategoryAttribute : Attribute
+    {
+        /// <summary>
+        /// The value category used for formatting.
+        /// </summary>
+        public FlaxEditor.Utilities.Utils.ValueCategory Category;
+
+        private ValueCategoryAttribute()
+        {
+            Category = FlaxEditor.Utilities.Utils.ValueCategory.None;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ValueCategoryAttribute"/> class.
+        /// </summary>
+        /// <param name="category">The value category.</param>
+        public ValueCategoryAttribute(FlaxEditor.Utilities.Utils.ValueCategory category)
+        {
+            Category = category;
+        }
+    }
+}