fix: adds break case in TextNode

Author: nadeem-cs

Contentstack.Management.Core/Models/TextNode.cs

@@ -14,6 +14,7 @@ public class TextNode: Node
         public bool inlineCode { get; set; }
         public bool subscript { get; set; }
         public bool superscript { get; set; }
+        public bool break { get; set; }
         public string text { get; set; }
     }
 }

Contentstack.Management.Core/Utils/TextNodeJsonConverter.cs

@@ -69,6 +69,11 @@ public override void WriteJson(JsonWriter writer, TextNode value, JsonSerializer
                 writer.WritePropertyName("superscript");
                 writer.WriteValue(value.superscript);
             }
+            if (value.break)
+            {
+                writer.WritePropertyName("break");
+                writer.WriteValue(value.break);
+            }
             if (!string.IsNullOrEmpty(value.text))
             {
                 writer.WritePropertyName("text");