This adds support for the Casio MIDI devices originally supported by several
SCI0 games:
- Space Quest III
- Hoyle's Book Of Games I
- Quest For Glory I
- Leisure Suit Larry III
- The Colonel's Bequest
- Codename: Iceman
- Conquests Of Camelot
Depending on other game option checkboxes. This is used to
enable/disable the semi-smooth scrolling checkboxes for FM Towns Loom,
since it's only used when smooth scrolling is enabled.
This is based on the work done for GSoC by @taylorzhancher in PR #3256
Highlights:
- TTS has been hooked globally onto places where text is shown
- TTS is currently performed for textboxes and button texts
- TTS stops when text windows are disposed (which enhances the in-game
experience)
- No game-specific logic has been added
- This hasn't been extensively tested with all SCI16 games yet
- There will be cases that are not handled properly yet
- The TTS functions have been grouped under a SciTTS class
