Currently the code in Testomatio only shows the scenario's source code.
However, the descriptions of parent features and rules as well as
the steps of background sections may also be relevant to the tester.
Thus, this PR adds command line options to include the source code
of these elemnts in the exported scenatios.

In `getLocations` the child message is destructured already.
Since there is no invocation of `getLocation` on a child node,
the second destructuring is not needed.

A `Rule` cannot be the child of another rule. Thus, the check if
we are `inRule` is not needed. If nested rules were allowed in the
future, more than a single space of indentation would be needed
anyway.