[Celia/Phil] Option to select 'coaches' or 'carriages'

[opott]

It would be good to have the option in both the announcement generator and in Live Trains to select if you want it to announce as 'coaches' or 'carriages'.

[Sebrh11]

There's no file for carriages in the ones we have, its only coaches.

[davwheat]

Correct, but I did rip out my own "carriages" for Celia from another audio file:

https://github.com/Rail-Announcements/ketech-llpa-announcements/blob/6de4dc236a06a2077eccb41511e30778c7e70738/custom/Female1/e/carriages.mp3