DefaultConnectionEndStructure: need for TransportOrganisationRef and TypeOfProductCategoryRef

[Brickblock1]

Swedish business rules specify default/minimum connection times for a particular StopPlace to be for the combination of TransportMode, Authority and ProductCategory. See https://brm.samtrafiken.se/showtimes?pta=-1&station=uppsala+central

DefaultConnectionEndStructure currently has TransportMode and OperatorView elements inside which is not enough to represent the above. Adding TransportOrganisationRef and TypeOfProductCategoryRef to DefaultConnectionEndStructure would allow for representing these rules in NeTEx.

The need for TypeOfProductCategoryRef does not seem unique to Sweden but to also exist in Switzerland judging by the use of an extension. https://opentdatach.github.io/netexRealisationGuideSwitzerland/main/uc03_transfers.html

Goal would be to be able to represent the connection like this:

<DefaultConnection id="SE::DefaultConnection:740000005" version="any">
     <TransferDuration>
          <DefaultDuration>PT15M</DefaultDuration>
     </TransferDuration>
     <From>
          <TransportMode>rail</TransportMode>
          <AuthorityRef ref="SE::Authority:74" version="any" />
          <TypeOfProductCategoryRef  ref="SE::TypeOfProductCategory:NT" version="any" />
     </From>
     <To>
          <TransportMode>rail</TransportMode>
          <AuthorityRef ref="SE::Authority:1" version="any" />
          <TypeOfProductCategoryRef  ref="SE::TypeOfProductCategory:LT" version="any" />
     </To>
     <StopPlaceRef ref="SE::StopPlace:740000005" version="any" />
</DefaultConnection>