Refactoring Keyword mapping, introducing tuples

Src/AST/Myc.Ast.Evaluator.pas

@@ -385,7 +385,7 @@ begin
         SetLength(fields, N.Fields.Count);
         for i := 0 to N.Fields.Count - 1 do
             fields[i] := TPair<IKeyword, TDataValue>.Create(N.Fields[i].Key.Value, Visit(N.Fields[i].Value));
-        Result := TDataValue.FromGenericRecord(TKeywordMapping<TDataValue>.Create(fields));
+        Result := TDataValue.FromGenericRecord(TGenericRecord<TDataValue>.Create(fields));
     end;
 end;
 

Src/AST/Myc.Ast.RTL.TypeRegistry.pas

@@ -482,7 +482,7 @@ begin
             end;
         end;
 
-        Result := TDataValue.FromGenericRecord(TKeywordMapping<TDataValue>.Create(recFields.ToArray));
+        Result := TDataValue.FromGenericRecord(TGenericRecord<TDataValue>.Create(recFields.ToArray));
     finally
         recFields.Free;
     end;