Add alternate versions for platforms

[RetroFrogg]

Games have an “alternate names” field; it would be nice to have this for platforms too - being able to specify the different names that a platform had in different regions or in different iterations, ideally along with the ability to add pictures. For example, the Nintendo NES was released as the New Style NES, My Computer Tv, Twin Famicom, Dendy, Micro Genius, Pegasus etc. It would be great to be able to capture this richness of info in LB.