fix #900 Add the ability to insert/remove records from LocalListDataS…

…tore by index

domino-ui/src/main/java/org/dominokit/domino/ui/datatable/store/LocalListDataStore.java

@@ -553,6 +553,19 @@ public void addRecord(T record) {
     setData(newData);
   }
 
+  /**
+   * Inserts a single record to the data store at the specified index, updating both the original
+   * and filtered lists.
+   *
+   * @param index The insertion index.
+   * @param record The record to be added.
+   */
+  public void insertRecord(int index, T record) {
+    original.add(index, record);
+    List<T> newData = new ArrayList<>(original);
+    setData(newData);
+  }
+
   /**
    * Removes a single record from the data store, updating both the original and filtered lists.
    *
@@ -566,6 +579,16 @@ public void removeRecord(T record) {
     }
   }
 
+  /**
+   * Removes a single record from the data store from the specified index, updating both the
+   * original and filtered lists.
+   *
+   * @param index The index of the record to be removed
+   */
+  public void removeRecord(int index) {
+    removeRecord(original.get(index));
+  }
+
   /**
    * Updates a single record in the data store by replacing it with a new record, updating both the
    * original and filtered lists.