feat: add two dimensional data walker, refs: NOISSUE

TextParser/Data/DataSetManipulatorBase.cs

@@ -98,6 +98,8 @@ public abstract class DataSetManipulatorBase<TCollectedType, TDataType, TIndexTy
     // we do not know how to iterate a specific data set exactly, but we only need to find specific items to be able to continue with any other algorithm
     public abstract List<SearchResult<TIndexType>> FindInSet(TDataType data);
 
+    public abstract List<SearchResult<TIndexType>> GetAllItems();
+
     public List<DirectionalSearchResult<TIndexType>> FindAtPosition(IDataIndex<TIndexType> currentPosition, List<TDataType> data)
     {
         return this.FindAtPosition(currentPosition, data, this.ValidDirections());