Added option to add properties to rule (#66)

* Allow custom property or tags to be added on Rule

Co-authored-by: Anurag Tripathi <anurag.tripathi@microsoft.com>

src/RulesEngine/Models/Rule.cs

@@ -17,6 +17,14 @@ namespace RulesEngine.Models
     public class Rule
     {
         public string RuleName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the custom property or tags of the rule.
+        /// </summary>
+        /// <value>
+        /// The properties of the rule.
+        /// </value>
+        public Dictionary<string, object> Properties { get; set; }
         public string Operator { get; set; }
         public string ErrorMessage { get; set; }