Implemented method to clear search text value in mudchipfield. (#442)

Co-authored-by: Aishwarya Sounderrajan <aishwarya.s@telliant.net>

CodeBeam.MudBlazor.Extensions/Components/ChipField/MudChipField.razor.cs

@@ -199,5 +199,14 @@ public async Task Closed(MudChip<T> chip)
             await _textFieldExtendedReference.FocusAsync();
         }
 
+        /// <summary>
+        /// Clear the text field.
+        /// </summary>       
+        /// <returns></returns>
+        public async Task ClearTextField()
+        {            
+           await _textFieldExtendedReference.Clear();
+        }
+
     }
 }