Issue: Chained property and index access on regular variables

Issue: Chained property and index access on regular variables: a task in LegoFlow-SWE (Harbor dataset). Description Expressions that use dot notation to access nested properties or array elements on regular variables (variables that are not prefixed with ) are currently rejected by the expression…

The task

**Description** Expressions that use dot notation to access nested properties or array elements on regular variables (variables that are not prefixed with `#`) are currently rejected by the expression evaluator. For example, `foo.bars[0].name` and `a.b[0].x` throw an `ExpressionSyntaxErrorException` with a message…

Part of Lego-X/LegoFlow-SWE.