Added some skill achievements and some minor fixes

- Added “hidden” achievements for skills.
- Added support for “Spoken text only” TTS/Speech option (previously was not working)
- Added dice roll icon to denote RNG decisions
- Fixed minor bug with roll checks when skill did not yet exist
- Speculative: Reduced quest location-location-words from 15 to 10, in an effort to mitigate the cuda out of memory error experienced by some users.